diff --git a/app/api/missions/[missionId]/attachments/[attachmentId]/route.ts b/app/api/missions/[missionId]/attachments/[attachmentId]/route.ts
new file mode 100644
index 00000000..3ce0f0b2
--- /dev/null
+++ b/app/api/missions/[missionId]/attachments/[attachmentId]/route.ts
@@ -0,0 +1,80 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/app/api/auth/[...nextauth]/route';
+import { prisma } from '@/lib/prisma';
+import { deleteMissionAttachment } from '@/lib/mission-uploads';
+
+// Helper function to check authentication
+async function checkAuth(request: Request) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) {
+    console.error('Unauthorized access attempt:', {
+      url: request.url,
+      method: request.method,
+      headers: Object.fromEntries(request.headers)
+    });
+    return { authorized: false, userId: null };
+  }
+  return { authorized: true, userId: session.user.id };
+}
+
+// DELETE endpoint to remove an attachment
+export async function DELETE(
+  request: Request,
+  { params }: { params: { missionId: string, attachmentId: string } }
+) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { missionId, attachmentId } = params;
+    if (!missionId || !attachmentId) {
+      return NextResponse.json({ error: 'Mission ID and Attachment ID are required' }, { status: 400 });
+    }
+
+    // Check if mission exists and user has access to it
+    const mission = await prisma.mission.findFirst({
+      where: {
+        id: missionId,
+        OR: [
+          { creatorId: userId },
+          { missionUsers: { some: { userId, role: 'gardien-memoire' } } } // Only mission creator or memory guardian can delete
+        ]
+      },
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found or access denied' }, { status: 404 });
+    }
+
+    // Get the attachment to delete
+    const attachment = await prisma.attachment.findUnique({
+      where: {
+        id: attachmentId,
+        missionId
+      }
+    });
+
+    if (!attachment) {
+      return NextResponse.json({ error: 'Attachment not found' }, { status: 404 });
+    }
+
+    // Delete the file from Minio
+    await deleteMissionAttachment(attachment.filePath);
+
+    // Delete the attachment record from the database
+    await prisma.attachment.delete({
+      where: { id: attachmentId }
+    });
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error('Error deleting attachment:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+} 
\ No newline at end of file
diff --git a/app/api/missions/[missionId]/attachments/download/[attachmentId]/route.ts b/app/api/missions/[missionId]/attachments/download/[attachmentId]/route.ts
new file mode 100644
index 00000000..83bd6f4f
--- /dev/null
+++ b/app/api/missions/[missionId]/attachments/download/[attachmentId]/route.ts
@@ -0,0 +1,84 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/app/api/auth/[...nextauth]/route';
+import { prisma } from '@/lib/prisma';
+import { getSignedUrl } from '@aws-sdk/s3-request-presigner';
+import { GetObjectCommand } from '@aws-sdk/client-s3';
+import { s3Client, S3_CONFIG } from '@/lib/s3';
+
+// Helper function to check authentication
+async function checkAuth(request: Request) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) {
+    console.error('Unauthorized access attempt:', {
+      url: request.url,
+      method: request.method,
+      headers: Object.fromEntries(request.headers)
+    });
+    return { authorized: false, userId: null };
+  }
+  return { authorized: true, userId: session.user.id };
+}
+
+// GET endpoint to download an attachment
+export async function GET(
+  request: Request,
+  { params }: { params: { missionId: string, attachmentId: string } }
+) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { missionId, attachmentId } = params;
+    if (!missionId || !attachmentId) {
+      return NextResponse.json({ error: 'Mission ID and Attachment ID are required' }, { status: 400 });
+    }
+
+    // Check if mission exists and user has access to it
+    const mission = await prisma.mission.findFirst({
+      where: {
+        id: missionId,
+        OR: [
+          { creatorId: userId },
+          { missionUsers: { some: { userId } } }
+        ]
+      },
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found or access denied' }, { status: 404 });
+    }
+
+    // Get the attachment
+    const attachment = await prisma.attachment.findUnique({
+      where: {
+        id: attachmentId,
+        missionId
+      }
+    });
+
+    if (!attachment) {
+      return NextResponse.json({ error: 'Attachment not found' }, { status: 404 });
+    }
+
+    // Generate a presigned URL for downloading
+    const command = new GetObjectCommand({
+      Bucket: S3_CONFIG.bucket,
+      Key: attachment.filePath
+    });
+
+    // Set a short expiry for security (5 minutes)
+    const url = await getSignedUrl(s3Client, command, { expiresIn: 300 });
+
+    // Redirect the user to the presigned URL for direct download
+    return NextResponse.redirect(url);
+  } catch (error) {
+    console.error('Error downloading attachment:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+} 
\ No newline at end of file
diff --git a/app/api/missions/[missionId]/attachments/route.ts b/app/api/missions/[missionId]/attachments/route.ts
new file mode 100644
index 00000000..7a2ad6f5
--- /dev/null
+++ b/app/api/missions/[missionId]/attachments/route.ts
@@ -0,0 +1,73 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/app/api/auth/[...nextauth]/route';
+import { prisma } from '@/lib/prisma';
+
+// Helper function to check authentication
+async function checkAuth(request: Request) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) {
+    console.error('Unauthorized access attempt:', {
+      url: request.url,
+      method: request.method,
+      headers: Object.fromEntries(request.headers)
+    });
+    return { authorized: false, userId: null };
+  }
+  return { authorized: true, userId: session.user.id };
+}
+
+// GET endpoint to list all attachments for a mission
+export async function GET(
+  request: Request,
+  { params }: { params: { missionId: string } }
+) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { missionId } = params;
+    if (!missionId) {
+      return NextResponse.json({ error: 'Mission ID is required' }, { status: 400 });
+    }
+
+    // Check if mission exists and user has access to it
+    const mission = await prisma.mission.findFirst({
+      where: {
+        id: missionId,
+        OR: [
+          { creatorId: userId },
+          { missionUsers: { some: { userId } } }
+        ]
+      },
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found or access denied' }, { status: 404 });
+    }
+
+    // Get all attachments for the mission
+    const attachments = await prisma.attachment.findMany({
+      where: { missionId },
+      orderBy: { createdAt: 'desc' },
+      select: {
+        id: true,
+        filename: true,
+        filePath: true,
+        fileType: true,
+        fileSize: true,
+        createdAt: true
+      }
+    });
+
+    return NextResponse.json(attachments);
+  } catch (error) {
+    console.error('Error fetching mission attachments:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+} 
\ No newline at end of file
diff --git a/app/api/missions/[missionId]/route.ts b/app/api/missions/[missionId]/route.ts
new file mode 100644
index 00000000..a39dec8c
--- /dev/null
+++ b/app/api/missions/[missionId]/route.ts
@@ -0,0 +1,302 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/app/api/auth/[...nextauth]/route';
+import { prisma } from '@/lib/prisma';
+import { deleteMissionLogo } from '@/lib/mission-uploads';
+
+// Helper function to check authentication
+async function checkAuth(request: Request) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) {
+    console.error('Unauthorized access attempt:', {
+      url: request.url,
+      method: request.method,
+      headers: Object.fromEntries(request.headers)
+    });
+    return { authorized: false, userId: null };
+  }
+  return { authorized: true, userId: session.user.id };
+}
+
+// GET endpoint to retrieve a mission by ID
+export async function GET(
+  request: Request,
+  { params }: { params: { missionId: string } }
+) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { missionId } = params;
+    if (!missionId) {
+      return NextResponse.json({ error: 'Mission ID is required' }, { status: 400 });
+    }
+
+    // Get mission with detailed info
+    const mission = await prisma.mission.findFirst({
+      where: {
+        id: missionId,
+        OR: [
+          { creatorId: userId },
+          { missionUsers: { some: { userId } } }
+        ]
+      },
+      include: {
+        creator: {
+          select: {
+            id: true,
+            email: true
+          }
+        },
+        missionUsers: {
+          select: {
+            id: true,
+            role: true,
+            user: {
+              select: {
+                id: true,
+                email: true
+              }
+            }
+          }
+        },
+        attachments: {
+          select: {
+            id: true,
+            filename: true,
+            filePath: true,
+            fileType: true,
+            fileSize: true,
+            createdAt: true
+          },
+          orderBy: { createdAt: 'desc' }
+        }
+      }
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found or access denied' }, { status: 404 });
+    }
+
+    return NextResponse.json(mission);
+  } catch (error) {
+    console.error('Error retrieving mission:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+}
+
+// PUT endpoint to update a mission
+export async function PUT(
+  request: Request,
+  { params }: { params: { missionId: string } }
+) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { missionId } = params;
+    if (!missionId) {
+      return NextResponse.json({ error: 'Mission ID is required' }, { status: 400 });
+    }
+
+    // Check if mission exists and user has access to modify it
+    const existingMission = await prisma.mission.findFirst({
+      where: {
+        id: missionId,
+        OR: [
+          { creatorId: userId },
+          { missionUsers: { some: { userId, role: { in: ['gardien-temps', 'gardien-parole'] } } } }
+        ]
+      }
+    });
+
+    if (!existingMission) {
+      return NextResponse.json({ error: 'Mission not found or not authorized to update' }, { status: 404 });
+    }
+
+    // Parse the request body
+    const body = await request.json();
+    const { 
+      name,
+      logo,
+      oddScope,
+      niveau,
+      intention,
+      missionType,
+      donneurDOrdre,
+      projection,
+      services,
+      participation,
+      profils,
+      guardians,
+      volunteers
+    } = body;
+
+    // Update the mission data
+    const updatedMission = await prisma.mission.update({
+      where: { id: missionId },
+      data: {
+        name,
+        logo,
+        oddScope: oddScope || undefined,
+        niveau,
+        intention,
+        missionType,
+        donneurDOrdre,
+        projection,
+        services: services || undefined,
+        participation,
+        profils: profils || undefined
+      }
+    });
+
+    // Update guardians if provided
+    if (guardians) {
+      // Get current guardians
+      const currentGuardians = await prisma.missionUser.findMany({
+        where: {
+          missionId,
+          role: { in: ['gardien-temps', 'gardien-parole', 'gardien-memoire'] }
+        }
+      });
+
+      // Delete all guardians
+      if (currentGuardians.length > 0) {
+        await prisma.missionUser.deleteMany({
+          where: {
+            missionId,
+            role: { in: ['gardien-temps', 'gardien-parole', 'gardien-memoire'] }
+          }
+        });
+      }
+
+      // Add new guardians
+      const guardianRoles = ['gardien-temps', 'gardien-parole', 'gardien-memoire'];
+      const guardianEntries = Object.entries(guardians)
+        .filter(([role, userId]) => guardianRoles.includes(role) && userId)
+        .map(([role, userId]) => ({
+          role,
+          userId: userId as string,
+          missionId
+        }));
+      
+      if (guardianEntries.length > 0) {
+        await prisma.missionUser.createMany({
+          data: guardianEntries
+        });
+      }
+    }
+
+    // Update volunteers if provided
+    if (volunteers) {
+      // Get current volunteers
+      const currentVolunteers = await prisma.missionUser.findMany({
+        where: {
+          missionId,
+          role: 'volontaire'
+        }
+      });
+
+      // Delete all volunteers
+      if (currentVolunteers.length > 0) {
+        await prisma.missionUser.deleteMany({
+          where: {
+            missionId,
+            role: 'volontaire'
+          }
+        });
+      }
+
+      // Add new volunteers
+      if (volunteers.length > 0) {
+        const volunteerEntries = volunteers.map((userId: string) => ({
+          role: 'volontaire',
+          userId,
+          missionId
+        }));
+        
+        await prisma.missionUser.createMany({
+          data: volunteerEntries
+        });
+      }
+    }
+
+    return NextResponse.json({
+      success: true,
+      mission: {
+        id: updatedMission.id,
+        name: updatedMission.name,
+        updatedAt: updatedMission.updatedAt
+      }
+    });
+  } catch (error) {
+    console.error('Error updating mission:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+}
+
+// DELETE endpoint to remove a mission
+export async function DELETE(
+  request: Request,
+  { params }: { params: { missionId: string } }
+) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { missionId } = params;
+    if (!missionId) {
+      return NextResponse.json({ error: 'Mission ID is required' }, { status: 400 });
+    }
+
+    // Check if mission exists and user is the creator
+    const mission = await prisma.mission.findFirst({
+      where: {
+        id: missionId,
+        creatorId: userId  // Only creator can delete a mission
+      },
+      include: {
+        attachments: true
+      }
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found or not authorized to delete' }, { status: 404 });
+    }
+
+    // Delete logo if exists
+    if (mission.logo) {
+      try {
+        await deleteMissionLogo(mission.logo);
+      } catch (error) {
+        console.error('Error deleting mission logo:', error);
+        // Continue deletion even if logo deletion fails
+      }
+    }
+
+    // Delete mission (cascade will handle missionUsers and attachments)
+    await prisma.mission.delete({
+      where: { id: missionId }
+    });
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error('Error deleting mission:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+} 
\ No newline at end of file
diff --git a/app/api/missions/route.ts b/app/api/missions/route.ts
new file mode 100644
index 00000000..544e2e46
--- /dev/null
+++ b/app/api/missions/route.ts
@@ -0,0 +1,213 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/app/api/auth/[...nextauth]/route';
+import { prisma } from '@/lib/prisma';
+
+// Helper function to check authentication
+async function checkAuth(request: Request) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) {
+    console.error('Unauthorized access attempt:', {
+      url: request.url,
+      method: request.method,
+      headers: Object.fromEntries(request.headers)
+    });
+    return { authorized: false, userId: null };
+  }
+  return { authorized: true, userId: session.user.id };
+}
+
+// GET endpoint to list missions with filters
+export async function GET(request: Request) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { searchParams } = new URL(request.url);
+    const limit = Number(searchParams.get('limit') || '10');
+    const offset = Number(searchParams.get('offset') || '0');
+    const search = searchParams.get('search');
+    
+    // Build query conditions
+    const where: any = {};
+    
+    // Add search filter if provided
+    if (search) {
+      where.OR = [
+        { name: { contains: search, mode: 'insensitive' } },
+        { intention: { contains: search, mode: 'insensitive' } }
+      ];
+    }
+    
+    // Get missions with basic info
+    const missions = await prisma.mission.findMany({
+      where,
+      skip: offset,
+      take: limit,
+      orderBy: { createdAt: 'desc' },
+      select: {
+        id: true,
+        name: true,
+        logo: true,
+        oddScope: true,
+        niveau: true,
+        missionType: true,
+        projection: true,
+        createdAt: true,
+        creator: {
+          select: {
+            id: true,
+            email: true
+          }
+        },
+        missionUsers: {
+          select: {
+            id: true,
+            role: true,
+            user: {
+              select: {
+                id: true,
+                email: true
+              }
+            }
+          }
+        }
+      }
+    });
+    
+    // Get total count
+    const totalCount = await prisma.mission.count({ where });
+    
+    return NextResponse.json({
+      missions,
+      pagination: {
+        total: totalCount,
+        offset,
+        limit
+      }
+    });
+  } catch (error) {
+    console.error('Error listing missions:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+}
+
+// POST endpoint to create a new mission
+export async function POST(request: Request) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    // Parse the request body
+    const body = await request.json();
+    const { 
+      name,
+      logo,
+      oddScope,
+      niveau,
+      intention,
+      missionType,
+      donneurDOrdre,
+      projection,
+      services,
+      participation,
+      profils,
+      guardians,
+      volunteers
+    } = body;
+    
+    // Validate required fields
+    if (!name || !niveau || !intention || !missionType || !donneurDOrdre || !projection) {
+      return NextResponse.json({ 
+        error: 'Missing required fields',
+        required: { 
+          name: true, 
+          niveau: true, 
+          intention: true, 
+          missionType: true,
+          donneurDOrdre: true,
+          projection: true
+        },
+        received: { 
+          name: !!name, 
+          niveau: !!niveau, 
+          intention: !!intention, 
+          missionType: !!missionType,
+          donneurDOrdre: !!donneurDOrdre,
+          projection: !!projection
+        }
+      }, { status: 400 });
+    }
+    
+    // Create the mission
+    const mission = await prisma.mission.create({
+      data: {
+        name,
+        logo,
+        oddScope: oddScope || [],
+        niveau,
+        intention,
+        missionType,
+        donneurDOrdre,
+        projection,
+        services: services || [],
+        participation,
+        profils: profils || [],
+        creatorId: userId
+      }
+    });
+    
+    // Add guardians if provided
+    if (guardians) {
+      const guardianRoles = ['gardien-temps', 'gardien-parole', 'gardien-memoire'];
+      const guardianEntries = Object.entries(guardians)
+        .filter(([role, userId]) => guardianRoles.includes(role) && userId)
+        .map(([role, userId]) => ({
+          role,
+          userId: userId as string,
+          missionId: mission.id
+        }));
+      
+      if (guardianEntries.length > 0) {
+        await prisma.missionUser.createMany({
+          data: guardianEntries
+        });
+      }
+    }
+    
+    // Add volunteers if provided
+    if (volunteers && volunteers.length > 0) {
+      const volunteerEntries = volunteers.map((userId: string) => ({
+        role: 'volontaire',
+        userId,
+        missionId: mission.id
+      }));
+      
+      await prisma.missionUser.createMany({
+        data: volunteerEntries
+      });
+    }
+    
+    return NextResponse.json({
+      success: true,
+      mission: {
+        id: mission.id,
+        name: mission.name,
+        createdAt: mission.createdAt
+      }
+    });
+  } catch (error) {
+    console.error('Error creating mission:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+} 
\ No newline at end of file
diff --git a/app/api/missions/upload/route.ts b/app/api/missions/upload/route.ts
new file mode 100644
index 00000000..f7823b55
--- /dev/null
+++ b/app/api/missions/upload/route.ts
@@ -0,0 +1,176 @@
+import { NextResponse } from 'next/server';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/app/api/auth/[...nextauth]/route';
+import { PrismaClient } from '@prisma/client';
+import { prisma } from '@/lib/prisma';
+import { 
+  uploadMissionLogo, 
+  uploadMissionAttachment, 
+  generateMissionLogoUploadUrl,
+  generateMissionAttachmentUploadUrl
+} from '@/lib/mission-uploads';
+
+// Helper function to check authentication
+async function checkAuth(request: Request) {
+  const session = await getServerSession(authOptions);
+  if (!session?.user?.id) {
+    console.error('Unauthorized access attempt:', {
+      url: request.url,
+      method: request.method,
+      headers: Object.fromEntries(request.headers)
+    });
+    return { authorized: false, userId: null };
+  }
+  return { authorized: true, userId: session.user.id };
+}
+
+// Generate presigned URL for direct upload to S3/Minio
+export async function GET(request: Request) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { searchParams } = new URL(request.url);
+    const missionId = searchParams.get('missionId');
+    const type = searchParams.get('type'); // 'logo' or 'attachment'
+    const filename = searchParams.get('filename');
+    
+    if (!missionId || !type || !filename) {
+      return NextResponse.json({ 
+        error: 'Missing required parameters', 
+        required: { missionId: true, type: true, filename: true },
+        received: { missionId: !!missionId, type: !!type, filename: !!filename }
+      }, { status: 400 });
+    }
+
+    // Verify that the mission exists and user has access to it
+    const mission = await prisma.mission.findUnique({
+      where: { id: missionId },
+      select: { id: true, creatorId: true }
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found' }, { status: 404 });
+    }
+
+    // Currently only allow creator to upload files
+    // You can modify this to include other roles if needed
+    if (mission.creatorId !== userId) {
+      return NextResponse.json({ error: 'Not authorized to upload to this mission' }, { status: 403 });
+    }
+
+    let result;
+    if (type === 'logo') {
+      // For logo, we expect filename to contain the file extension (e.g., '.jpg')
+      const fileExtension = filename.substring(filename.lastIndexOf('.'));
+      result = await generateMissionLogoUploadUrl(userId, missionId, fileExtension);
+    } else if (type === 'attachment') {
+      result = await generateMissionAttachmentUploadUrl(userId, missionId, filename);
+    } else {
+      return NextResponse.json({ error: 'Invalid upload type' }, { status: 400 });
+    }
+
+    return NextResponse.json(result);
+  } catch (error) {
+    console.error('Error generating upload URL:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+}
+
+// Handle file upload (server-side)
+export async function POST(request: Request) {
+  try {
+    const { authorized, userId } = await checkAuth(request);
+    if (!authorized || !userId) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    // Parse the form data
+    const formData = await request.formData();
+    const missionId = formData.get('missionId') as string;
+    const type = formData.get('type') as string; // 'logo' or 'attachment'
+    const file = formData.get('file') as File;
+
+    if (!missionId || !type || !file) {
+      return NextResponse.json({ 
+        error: 'Missing required fields', 
+        required: { missionId: true, type: true, file: true },
+        received: { missionId: !!missionId, type: !!type, file: !!file }
+      }, { status: 400 });
+    }
+
+    // Verify that the mission exists and user has access to it
+    const mission = await prisma.mission.findUnique({
+      where: { id: missionId },
+      select: { id: true, creatorId: true }
+    });
+
+    if (!mission) {
+      return NextResponse.json({ error: 'Mission not found' }, { status: 404 });
+    }
+
+    // Currently only allow creator to upload files
+    if (mission.creatorId !== userId) {
+      return NextResponse.json({ error: 'Not authorized to upload to this mission' }, { status: 403 });
+    }
+
+    if (type === 'logo') {
+      // Upload logo file to Minio
+      const { filePath } = await uploadMissionLogo(userId, missionId, file);
+      
+      // Update mission record with logo path
+      await prisma.mission.update({
+        where: { id: missionId },
+        data: { logo: filePath }
+      });
+      
+      return NextResponse.json({ success: true, filePath });
+    } 
+    else if (type === 'attachment') {
+      // Upload attachment file to Minio
+      const { filename, filePath, fileType, fileSize } = await uploadMissionAttachment(
+        userId, 
+        missionId, 
+        file
+      );
+      
+      // Create attachment record in database
+      const attachment = await prisma.attachment.create({
+        data: {
+          filename,
+          filePath,
+          fileType,
+          fileSize,
+          missionId,
+          uploaderId: userId
+        }
+      });
+      
+      return NextResponse.json({ 
+        success: true, 
+        attachment: {
+          id: attachment.id,
+          filename: attachment.filename,
+          filePath: attachment.filePath,
+          fileType: attachment.fileType,
+          fileSize: attachment.fileSize,
+          createdAt: attachment.createdAt
+        }
+      });
+    } 
+    else {
+      return NextResponse.json({ error: 'Invalid upload type' }, { status: 400 });
+    }
+  } catch (error) {
+    console.error('Error uploading file:', error);
+    return NextResponse.json({ 
+      error: 'Internal server error', 
+      details: error instanceof Error ? error.message : String(error) 
+    }, { status: 500 });
+  }
+} 
\ No newline at end of file
diff --git a/components/missions/attachments-list.tsx b/components/missions/attachments-list.tsx
new file mode 100644
index 00000000..f3638caf
--- /dev/null
+++ b/components/missions/attachments-list.tsx
@@ -0,0 +1,292 @@
+"use client";
+
+import React, { useState, useEffect } from 'react';
+import { 
+  FileText, 
+  Image, 
+  File, 
+  Trash2, 
+  Download, 
+  Loader2,
+  FileSpreadsheet,
+  FileArchive,
+  FileVideo,
+  FileAudio,
+  FilePlus
+} from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { 
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle,
+} from "@/components/ui/alert-dialog";
+import { useSession } from 'next-auth/react';
+import { toast } from '@/components/ui/use-toast';
+import { FileUpload } from './file-upload';
+
+interface Attachment {
+  id: string;
+  filename: string;
+  filePath: string;
+  fileType: string;
+  fileSize: number;
+  createdAt: string;
+}
+
+interface AttachmentsListProps {
+  missionId: string;
+  initialAttachments?: Attachment[];
+  allowUpload?: boolean;
+  allowDelete?: boolean;
+  onAttachmentAdded?: (attachment: Attachment) => void;
+  onAttachmentDeleted?: (attachmentId: string) => void;
+}
+
+export function AttachmentsList({
+  missionId,
+  initialAttachments = [],
+  allowUpload = true,
+  allowDelete = true,
+  onAttachmentAdded,
+  onAttachmentDeleted
+}: AttachmentsListProps) {
+  const { data: session } = useSession();
+  const [attachments, setAttachments] = useState<Attachment[]>(initialAttachments);
+  const [isLoading, setIsLoading] = useState(false);
+  const [deleteAttachment, setDeleteAttachment] = useState<Attachment | null>(null);
+  const [showUpload, setShowUpload] = useState(false);
+  
+  // Fetch attachments for the mission if not provided initially
+  useEffect(() => {
+    if (initialAttachments.length === 0) {
+      fetchAttachments();
+    }
+  }, [missionId]);
+  
+  const fetchAttachments = async () => {
+    if (!missionId || !session?.user?.id) return;
+    
+    setIsLoading(true);
+    try {
+      const response = await fetch(`/api/missions/${missionId}/attachments`);
+      if (!response.ok) {
+        throw new Error('Failed to fetch attachments');
+      }
+      
+      const data = await response.json();
+      setAttachments(data);
+    } catch (error) {
+      console.error('Error fetching attachments:', error);
+      toast({
+        title: 'Error',
+        description: 'Failed to load attachments',
+        variant: 'destructive',
+      });
+    } finally {
+      setIsLoading(false);
+    }
+  };
+  
+  const handleAttachmentUploaded = (data: any) => {
+    if (data?.attachment) {
+      setAttachments(prev => [...prev, data.attachment]);
+      setShowUpload(false);
+      
+      if (onAttachmentAdded) {
+        onAttachmentAdded(data.attachment);
+      }
+    }
+  };
+  
+  const handleAttachmentDelete = async () => {
+    if (!deleteAttachment) return;
+    
+    try {
+      const response = await fetch(`/api/missions/${missionId}/attachments/${deleteAttachment.id}`, {
+        method: 'DELETE',
+      });
+      
+      if (!response.ok) {
+        throw new Error('Failed to delete attachment');
+      }
+      
+      setAttachments(prev => prev.filter(a => a.id !== deleteAttachment.id));
+      
+      if (onAttachmentDeleted) {
+        onAttachmentDeleted(deleteAttachment.id);
+      }
+      
+      toast({
+        title: 'Success',
+        description: 'Attachment deleted successfully',
+        variant: 'default',
+      });
+    } catch (error) {
+      console.error('Error deleting attachment:', error);
+      toast({
+        title: 'Error',
+        description: 'Failed to delete attachment',
+        variant: 'destructive',
+      });
+    } finally {
+      setDeleteAttachment(null);
+    }
+  };
+  
+  const getFileIcon = (fileType: string) => {
+    if (fileType.startsWith('image/')) {
+      return <Image className="h-5 w-5 text-blue-500" />;
+    } else if (fileType.includes('pdf')) {
+      return <FileText className="h-5 w-5 text-red-500" />;
+    } else if (fileType.includes('spreadsheet') || fileType.includes('excel') || fileType.includes('csv')) {
+      return <FileSpreadsheet className="h-5 w-5 text-green-500" />;
+    } else if (fileType.includes('zip') || fileType.includes('compressed')) {
+      return <FileArchive className="h-5 w-5 text-purple-500" />;
+    } else if (fileType.includes('video')) {
+      return <FileVideo className="h-5 w-5 text-pink-500" />;
+    } else if (fileType.includes('audio')) {
+      return <FileAudio className="h-5 w-5 text-orange-500" />;
+    } else {
+      return <File className="h-5 w-5 text-gray-500" />;
+    }
+  };
+  
+  const formatFileSize = (bytes: number): string => {
+    if (bytes < 1024) {
+      return `${bytes} B`;
+    } else if (bytes < 1024 * 1024) {
+      return `${(bytes / 1024).toFixed(1)} KB`;
+    } else {
+      return `${(bytes / (1024 * 1024)).toFixed(1)} MB`;
+    }
+  };
+  
+  return (
+    <div className="space-y-4">
+      {(allowUpload && !showUpload) && (
+        <div className="flex justify-end">
+          <Button
+            variant="outline"
+            size="sm"
+            onClick={() => setShowUpload(true)}
+            className="bg-white text-gray-700 border-gray-300 hover:bg-gray-50"
+          >
+            <FilePlus className="h-4 w-4 mr-1" />
+            Add Attachment
+          </Button>
+        </div>
+      )}
+      
+      {showUpload && (
+        <div className="mb-6">
+          <h4 className="text-sm font-medium mb-2 text-gray-700">Upload New Attachment</h4>
+          <FileUpload
+            type="attachment"
+            missionId={missionId}
+            onUploadComplete={handleAttachmentUploaded}
+          />
+          <div className="mt-2 flex justify-end">
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={() => setShowUpload(false)}
+              className="text-gray-500"
+            >
+              Cancel
+            </Button>
+          </div>
+        </div>
+      )}
+      
+      {isLoading ? (
+        <div className="flex justify-center items-center p-8">
+          <Loader2 className="h-8 w-8 animate-spin text-gray-400" />
+        </div>
+      ) : attachments.length === 0 ? (
+        <div className="text-center p-8 bg-gray-50 border border-gray-200 rounded-md">
+          <File className="h-10 w-10 text-gray-300 mx-auto mb-2" />
+          <p className="text-sm text-gray-500">No attachments yet</p>
+          {allowUpload && (
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => setShowUpload(true)}
+              className="mt-4 bg-white text-gray-700 border-gray-300 hover:bg-gray-50"
+            >
+              <FilePlus className="h-4 w-4 mr-1" />
+              Add your first attachment
+            </Button>
+          )}
+        </div>
+      ) : (
+        <div className="border rounded-md overflow-hidden">
+          <ul className="divide-y">
+            {attachments.map((attachment) => (
+              <li key={attachment.id} className="flex items-center justify-between p-3 hover:bg-gray-50">
+                <div className="flex items-center space-x-3">
+                  <div className="flex-shrink-0">
+                    {getFileIcon(attachment.fileType)}
+                  </div>
+                  <div>
+                    <p className="font-medium text-sm text-gray-900">{attachment.filename}</p>
+                    <p className="text-xs text-gray-500">
+                      {formatFileSize(attachment.fileSize)} • {new Date(attachment.createdAt).toLocaleDateString()}
+                    </p>
+                  </div>
+                </div>
+                <div className="flex space-x-1">
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    asChild
+                    className="text-gray-500 hover:text-gray-700 hover:bg-gray-100"
+                  >
+                    <a 
+                      href={`/api/missions/${missionId}/attachments/download/${attachment.id}`} 
+                      download={attachment.filename}
+                    >
+                      <Download className="h-4 w-4" />
+                    </a>
+                  </Button>
+                  
+                  {allowDelete && (
+                    <Button
+                      variant="ghost"
+                      size="sm"
+                      onClick={() => setDeleteAttachment(attachment)}
+                      className="text-red-500 hover:text-red-700 hover:bg-red-50"
+                    >
+                      <Trash2 className="h-4 w-4" />
+                    </Button>
+                  )}
+                </div>
+              </li>
+            ))}
+          </ul>
+        </div>
+      )}
+      
+      <AlertDialog open={!!deleteAttachment} onOpenChange={(open) => !open && setDeleteAttachment(null)}>
+        <AlertDialogContent>
+          <AlertDialogHeader>
+            <AlertDialogTitle>Delete Attachment</AlertDialogTitle>
+            <AlertDialogDescription>
+              Are you sure you want to delete "{deleteAttachment?.filename}"? This action cannot be undone.
+            </AlertDialogDescription>
+          </AlertDialogHeader>
+          <AlertDialogFooter>
+            <AlertDialogCancel>Cancel</AlertDialogCancel>
+            <AlertDialogAction onClick={handleAttachmentDelete} className="bg-red-600 hover:bg-red-700 text-white">
+              Delete
+            </AlertDialogAction>
+          </AlertDialogFooter>
+        </AlertDialogContent>
+      </AlertDialog>
+    </div>
+  );
+} 
\ No newline at end of file
diff --git a/components/missions/file-upload.tsx b/components/missions/file-upload.tsx
new file mode 100644
index 00000000..11a66071
--- /dev/null
+++ b/components/missions/file-upload.tsx
@@ -0,0 +1,262 @@
+"use client";
+
+import React, { useState, useRef } from 'react';
+import { UploadCloud, X, Check, Loader2 } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useSession } from 'next-auth/react';
+import { toast } from '@/components/ui/use-toast';
+
+interface FileUploadProps {
+  type: 'logo' | 'attachment';
+  missionId: string;
+  onUploadComplete?: (data: any) => void;
+  maxSize?: number; // in bytes, default 5MB
+  acceptedFileTypes?: string;
+}
+
+export function FileUpload({
+  type,
+  missionId,
+  onUploadComplete,
+  maxSize = 5 * 1024 * 1024, // 5MB
+  acceptedFileTypes = type === 'logo' ? 'image/*' : '.pdf,.doc,.docx,.xls,.xlsx,.jpg,.jpeg,.png'
+}: FileUploadProps) {
+  const { data: session } = useSession();
+  const [isDragging, setIsDragging] = useState(false);
+  const [isUploading, setIsUploading] = useState(false);
+  const [progress, setProgress] = useState(0);
+  const [file, setFile] = useState<File | null>(null);
+  const [error, setError] = useState<string | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  
+  // Handle drag events
+  const handleDragOver = (e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(true);
+  };
+  
+  const handleDragLeave = (e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(false);
+  };
+  
+  const validateFile = (file: File): boolean => {
+    // Check file size
+    if (file.size > maxSize) {
+      setError(`File size exceeds the limit of ${maxSize / (1024 * 1024)}MB`);
+      return false;
+    }
+    
+    // Check file type for logo
+    if (type === 'logo' && !file.type.startsWith('image/')) {
+      setError('Only image files are allowed for logo');
+      return false;
+    }
+    
+    // For attachments, check file extension
+    if (type === 'attachment') {
+      const ext = file.name.split('.').pop()?.toLowerCase();
+      const allowedExt = ['pdf', 'doc', 'docx', 'xls', 'xlsx', 'jpg', 'jpeg', 'png'];
+      if (ext && !allowedExt.includes(ext)) {
+        setError(`File type .${ext} is not allowed. Allowed types: ${allowedExt.join(', ')}`);
+        return false;
+      }
+    }
+    
+    setError(null);
+    return true;
+  };
+  
+  const handleFileDrop = (e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(false);
+    
+    if (e.dataTransfer.files && e.dataTransfer.files.length > 0) {
+      const droppedFile = e.dataTransfer.files[0];
+      if (validateFile(droppedFile)) {
+        setFile(droppedFile);
+      }
+    }
+  };
+  
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    if (e.target.files && e.target.files.length > 0) {
+      const selectedFile = e.target.files[0];
+      if (validateFile(selectedFile)) {
+        setFile(selectedFile);
+      }
+    }
+  };
+  
+  const handleUpload = async () => {
+    if (!file || !session?.user?.id || !missionId) return;
+    
+    setIsUploading(true);
+    setProgress(0);
+    
+    try {
+      // Create form data
+      const formData = new FormData();
+      formData.append('file', file);
+      formData.append('missionId', missionId);
+      formData.append('type', type);
+      
+      // Upload the file
+      const response = await fetch('/api/missions/upload', {
+        method: 'POST',
+        body: formData
+      });
+      
+      if (!response.ok) {
+        const error = await response.json();
+        throw new Error(error.error || 'Upload failed');
+      }
+      
+      const result = await response.json();
+      setProgress(100);
+      
+      // Reset file after successful upload
+      setTimeout(() => {
+        setFile(null);
+        setIsUploading(false);
+        setProgress(0);
+        
+        // Call the callback if provided
+        if (onUploadComplete) {
+          onUploadComplete(result);
+        }
+        
+        toast({
+          title: 'File uploaded successfully',
+          description: type === 'logo' ? 'Logo has been updated' : `${file.name} has been added to attachments`,
+          variant: 'default',
+        });
+      }, 1000);
+    } catch (error) {
+      console.error('Upload error:', error);
+      setIsUploading(false);
+      toast({
+        title: 'Upload failed',
+        description: error instanceof Error ? error.message : 'An error occurred during upload',
+        variant: 'destructive',
+      });
+    }
+  };
+  
+  const handleCancel = () => {
+    setFile(null);
+    setError(null);
+  };
+  
+  return (
+    <div className="w-full">
+      {!file ? (
+        <div
+          className={`border-2 border-dashed rounded-md p-6 text-center transition-colors ${
+            isDragging ? 'border-blue-500 bg-blue-50' : 'border-gray-300 bg-gray-50'
+          }`}
+          onDragOver={handleDragOver}
+          onDragLeave={handleDragLeave}
+          onDrop={handleFileDrop}
+        >
+          <div className="flex flex-col items-center justify-center">
+            <UploadCloud className="h-10 w-10 text-gray-400 mb-2" />
+            <p className="text-sm mb-2 font-medium text-gray-700">
+              {type === 'logo' ? 'Upload logo image' : 'Upload attachment'}
+            </p>
+            <p className="text-xs text-gray-500 mb-4">
+              Drag and drop or click to browse
+            </p>
+            <Button
+              variant="outline"
+              size="sm"
+              className="bg-white text-gray-700 border-gray-300 hover:bg-gray-50"
+              onClick={() => fileInputRef.current?.click()}
+            >
+              Browse Files
+            </Button>
+            <input
+              type="file"
+              ref={fileInputRef}
+              className="hidden"
+              onChange={handleFileChange}
+              accept={acceptedFileTypes}
+            />
+            {error && (
+              <p className="text-xs text-red-500 mt-2">{error}</p>
+            )}
+          </div>
+        </div>
+      ) : (
+        <div className="border rounded-md p-4 bg-white">
+          <div className="flex items-center justify-between">
+            <div className="flex items-center space-x-3">
+              <div className="flex-shrink-0 h-10 w-10 bg-gray-100 rounded-md flex items-center justify-center">
+                {type === 'logo' ? (
+                  <img
+                    src={URL.createObjectURL(file)}
+                    alt="Preview"
+                    className="h-full w-full object-cover rounded-md"
+                  />
+                ) : (
+                  <div className="text-xs font-bold bg-blue-100 text-blue-600 h-full w-full rounded-md flex items-center justify-center">
+                    {file.name.split('.').pop()?.toUpperCase()}
+                  </div>
+                )}
+              </div>
+              <div className="min-w-0 flex-1">
+                <p className="text-sm font-medium text-gray-900 truncate">
+                  {file.name}
+                </p>
+                <p className="text-xs text-gray-500">
+                  {(file.size / 1024).toFixed(2)} KB
+                </p>
+              </div>
+            </div>
+            
+            <div className="flex items-center space-x-2">
+              {isUploading ? (
+                <div className="flex items-center">
+                  <Loader2 className="animate-spin h-4 w-4 mr-1 text-blue-500" />
+                  <span className="text-xs text-gray-500">{progress}%</span>
+                </div>
+              ) : (
+                <>
+                  <Button
+                    variant="ghost"
+                    size="sm"
+                    className="text-red-500 hover:text-red-700 hover:bg-red-50"
+                    onClick={handleCancel}
+                  >
+                    <X className="h-4 w-4" />
+                  </Button>
+                  <Button
+                    variant="default"
+                    size="sm"
+                    className="bg-blue-600 hover:bg-blue-700 text-white"
+                    onClick={handleUpload}
+                  >
+                    <Check className="h-4 w-4 mr-1" />
+                    Upload
+                  </Button>
+                </>
+              )}
+            </div>
+          </div>
+          
+          {isUploading && (
+            <div className="w-full bg-gray-200 rounded-full h-1.5 mt-3">
+              <div
+                className="bg-blue-600 h-1.5 rounded-full"
+                style={{ width: `${progress}%` }}
+              ></div>
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+} 
\ No newline at end of file
diff --git a/components/missions/missions-admin-panel.tsx b/components/missions/missions-admin-panel.tsx
index 932a559c..b4faac91 100644
--- a/components/missions/missions-admin-panel.tsx
+++ b/components/missions/missions-admin-panel.tsx
@@ -25,6 +25,8 @@ import {
   DropdownMenuItem,
   DropdownMenuTrigger
 } from "../ui/dropdown-menu";
+import { FileUpload } from "./file-upload";
+import { AttachmentsList } from "./attachments-list";
 
 // Define interfaces for user and group data
 interface User {
@@ -57,6 +59,20 @@ export function MissionsAdminPanel() {
   const [gardienDeLaParole, setGardienDeLaParole] = useState<string | null>(null);
   const [gardienDeLaMemoire, setGardienDeLaMemoire] = useState<string | null>(null);
   const [volontaires, setVolontaires] = useState<string[]>([]);
+  const [missionId, setMissionId] = useState<string>("");
+  const [missionData, setMissionData] = useState<{
+    name?: string;
+    logo?: string;
+    oddScope?: string[];
+    niveau?: string;
+    intention?: string;
+    missionType?: string;
+    donneurDOrdre?: string;
+    projection?: string;
+    services?: string[];
+    participation?: string;
+    profils?: string[];
+  }>({});
 
   // State for storing fetched data
   const [users, setUsers] = useState<User[]>([]);
@@ -291,9 +307,19 @@ export function MissionsAdminPanel() {
                 
                 <div>
                   <label className="block text-sm font-medium mb-1 text-gray-700">Logo</label>
-                  <div className="border border-dashed rounded-md p-6 text-center bg-gray-50">
-                    <Button variant="outline" className="mb-2 bg-white text-gray-700 border-gray-300 hover:bg-gray-50">Browse</Button>
-                  </div>
+                  <FileUpload 
+                    type="logo"
+                    missionId={missionId || ""}
+                    onUploadComplete={(data) => {
+                      // Handle logo upload complete
+                      if (data?.filePath) {
+                        setMissionData(prev => ({
+                          ...prev,
+                          logo: data.filePath
+                        }));
+                      }
+                    }}
+                  />
                 </div>
                 
                 <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
@@ -614,11 +640,12 @@ export function MissionsAdminPanel() {
             
             <TabsContent value="attachments" className="space-y-6">
               <div>
-                <label className="block text-sm font-medium mb-1 text-gray-700">Attachments</label>
-                <div className="border border-dashed rounded-md p-6 text-center bg-gray-50">
-                  <Button variant="outline" className="mb-2 bg-white text-gray-700 border-gray-300 hover:bg-gray-50">Browse</Button>
-                  <p className="text-sm text-gray-500">Upload file .pdf, .doc, .docx</p>
-                </div>
+                <label className="block text-sm font-medium mb-1 text-gray-700">Attachements</label>
+                <AttachmentsList
+                  missionId={missionId || ""}
+                  allowUpload={true}
+                  allowDelete={true}
+                />
               </div>
             </TabsContent>
             
diff --git a/lib/mission-uploads.ts b/lib/mission-uploads.ts
new file mode 100644
index 00000000..6054d78c
--- /dev/null
+++ b/lib/mission-uploads.ts
@@ -0,0 +1,155 @@
+import { s3Client, putObject, generatePresignedUrl, S3_CONFIG, deleteObject } from '@/lib/s3';
+import { PutObjectCommand } from '@aws-sdk/client-s3';
+
+/**
+ * Utilities for mission-related file uploads using Minio
+ */
+
+// Generate the mission logo path in Minio
+export function getMissionLogoPath(userId: string, missionId: string, fileExtension: string): string {
+  return `user-${userId}/missions/${missionId}/logo${fileExtension}`;
+}
+
+// Generate the mission attachment path in Minio
+export function getMissionAttachmentPath(userId: string, missionId: string, filename: string): string {
+  return `user-${userId}/missions/${missionId}/attachments/${filename}`;
+}
+
+// Upload mission logo to Minio
+export async function uploadMissionLogo(
+  userId: string, 
+  missionId: string, 
+  file: File
+): Promise<{ filePath: string }> {
+  try {
+    // Get file extension
+    const fileExtension = file.name.substring(file.name.lastIndexOf('.'));
+    
+    // Create file path
+    const filePath = getMissionLogoPath(userId, missionId, fileExtension);
+    
+    // Convert file to ArrayBuffer
+    const arrayBuffer = await file.arrayBuffer();
+    const buffer = Buffer.from(arrayBuffer);
+    
+    // Upload to Minio
+    const command = new PutObjectCommand({
+      Bucket: S3_CONFIG.bucket,
+      Key: filePath,
+      Body: buffer,
+      ContentType: file.type,
+    });
+    
+    await s3Client.send(command);
+    
+    return { filePath };
+  } catch (error) {
+    console.error('Error uploading mission logo:', error);
+    throw new Error('Failed to upload mission logo');
+  }
+}
+
+// Upload mission attachment to Minio
+export async function uploadMissionAttachment(
+  userId: string, 
+  missionId: string, 
+  file: File
+): Promise<{ 
+  filename: string, 
+  filePath: string, 
+  fileType: string, 
+  fileSize: number 
+}> {
+  try {
+    // Create file path
+    const filePath = getMissionAttachmentPath(userId, missionId, file.name);
+    
+    // Convert file to ArrayBuffer
+    const arrayBuffer = await file.arrayBuffer();
+    const buffer = Buffer.from(arrayBuffer);
+    
+    // Upload to Minio
+    const command = new PutObjectCommand({
+      Bucket: S3_CONFIG.bucket,
+      Key: filePath,
+      Body: buffer,
+      ContentType: file.type,
+    });
+    
+    await s3Client.send(command);
+    
+    return {
+      filename: file.name,
+      filePath,
+      fileType: file.type,
+      fileSize: file.size,
+    };
+  } catch (error) {
+    console.error('Error uploading mission attachment:', error);
+    throw new Error('Failed to upload mission attachment');
+  }
+}
+
+// Generate presigned URL for direct browser upload of mission logo
+export async function generateMissionLogoUploadUrl(
+  userId: string, 
+  missionId: string, 
+  fileExtension: string, 
+  expiresIn = 3600
+): Promise<{ 
+  uploadUrl: string, 
+  filePath: string 
+}> {
+  try {
+    const filePath = getMissionLogoPath(userId, missionId, fileExtension);
+    const uploadUrl = await generatePresignedUrl(filePath, expiresIn);
+    
+    return { uploadUrl, filePath };
+  } catch (error) {
+    console.error('Error generating mission logo upload URL:', error);
+    throw new Error('Failed to generate upload URL for mission logo');
+  }
+}
+
+// Generate presigned URL for direct browser upload of mission attachment
+export async function generateMissionAttachmentUploadUrl(
+  userId: string, 
+  missionId: string, 
+  filename: string, 
+  expiresIn = 3600
+): Promise<{ 
+  uploadUrl: string, 
+  filePath: string 
+}> {
+  try {
+    const filePath = getMissionAttachmentPath(userId, missionId, filename);
+    const uploadUrl = await generatePresignedUrl(filePath, expiresIn);
+    
+    return { uploadUrl, filePath };
+  } catch (error) {
+    console.error('Error generating mission attachment upload URL:', error);
+    throw new Error('Failed to generate upload URL for mission attachment');
+  }
+}
+
+// Delete mission attachment from Minio
+export async function deleteMissionAttachment(filePath: string): Promise<boolean> {
+  try {
+    await deleteObject(filePath);
+    return true;
+  } catch (error) {
+    console.error('Error deleting mission attachment:', error);
+    throw new Error('Failed to delete mission attachment');
+  }
+}
+
+// Delete mission logo from Minio
+export async function deleteMissionLogo(filePath: string): Promise<boolean> {
+  try {
+    await deleteObject(filePath);
+    return true;
+  } catch (error) {
+    console.error('Error deleting mission logo:', error);
+    throw new Error('Failed to delete mission logo');
+  }
+} 
\ No newline at end of file
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index e74f0f40..b2f7c45e 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -22,6 +22,9 @@ model User {
   mailCredentials MailCredentials[]
   webdavCredentials WebDAVCredentials?
   announcements Announcement[]
+  missions          Mission[]
+  missionUsers      MissionUser[]
+  uploadedAttachments Attachment[]
 }
 
 model Calendar {
@@ -112,4 +115,60 @@ model Announcement {
   targetRoles String[]
 
   @@index([authorId])
+}
+
+// Mission models
+model Mission {
+  id                String        @id @default(uuid())
+  name              String
+  logo              String?       // Stores the path to the logo in Minio
+  oddScope          String[]      // Categories / ODD scope
+  niveau            String        // Project Type / Niveau
+  intention         String        // Description / Intention
+  missionType       String        // Project location type / Type de mission
+  donneurDOrdre     String        // Volunteer Type / Donneur d'ordre
+  projection        String        // Duration / Projection
+  services          String[]      // Experience / Services
+  participation     String?       // Friendly Address / Participation
+  profils           String[]      // Level / Profils
+  createdAt         DateTime      @default(now())
+  updatedAt         DateTime      @updatedAt
+  creator           User          @relation(fields: [creatorId], references: [id], onDelete: Cascade)
+  creatorId         String
+  attachments       Attachment[]
+  missionUsers      MissionUser[]
+
+  @@index([creatorId])
+}
+
+model Attachment {
+  id          String   @id @default(uuid())
+  filename    String   // Original filename
+  filePath    String   // Path in Minio: user-${userId}/missions/${missionId}/attachments/${filename}
+  fileType    String   // MIME type
+  fileSize    Int      // Size in bytes
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  mission     Mission  @relation(fields: [missionId], references: [id], onDelete: Cascade)
+  missionId   String
+  uploader    User     @relation(fields: [uploaderId], references: [id], onDelete: Cascade)
+  uploaderId  String
+
+  @@index([missionId])
+  @@index([uploaderId])
+}
+
+model MissionUser {
+  id          String   @id @default(uuid())
+  role        String   // 'gardien-temps', 'gardien-parole', 'gardien-memoire', 'volontaire'
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  mission     Mission  @relation(fields: [missionId], references: [id], onDelete: Cascade)
+  missionId   String
+  user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  userId      String
+
+  @@unique([missionId, userId, role])
+  @@index([missionId])
+  @@index([userId])
 }
\ No newline at end of file