diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..4d9636b
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "rust-analyzer.showUnlinkedFileNotification": false
+}
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 6ac8535..9877720 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1314,10 +1314,13 @@ dependencies = [
 name = "border-wars"
 version = "0.1.0"
 dependencies = [
+ "bevnet",
  "bevy",
  "bevy_egui",
  "noise",
  "paste",
+ "serde",
+ "uuid",
 ]
 
 [[package]]
@@ -3805,18 +3808,18 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.196"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "870026e60fa08c69f064aa766c10f10b1d62db9ccd4d0abb206472bee0ce3b32"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.196"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33c85360c95e7d137454dc81d9a4ed2b8efd8fbe19cee57357b32b9771fccb67"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/crates/border-wars/Cargo.toml b/crates/border-wars/Cargo.toml
index fc84f96..8ad9ea3 100644
--- a/crates/border-wars/Cargo.toml
+++ b/crates/border-wars/Cargo.toml
@@ -15,3 +15,6 @@ bevy = "0.12.1"
 bevy_egui = "0.24.0"
 noise = "0.8.2"
 paste = "1.0.14"
+bevnet = { path = "../bevnet" }
+uuid = "1.7.0"
+serde = "1.0.197"
diff --git a/crates/border-wars/src/connection.rs b/crates/border-wars/src/connection.rs
new file mode 100644
index 0000000..d1518b6
--- /dev/null
+++ b/crates/border-wars/src/connection.rs
@@ -0,0 +1,37 @@
+//! All the code related to the connection to an host.
+
+use std::collections::HashMap;
+
+use bevnet::NetworkAppExt;
+use bevy::prelude::*;
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+/// TODO
+#[derive(Resource, Default, Deserialize, Serialize, Clone)]
+pub struct AllPlayers(pub HashMap<String, Uuid>);
+
+/// The plugin that manages the connection to the host.
+pub struct ConnectionPlugin;
+
+impl Plugin for ConnectionPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_network_event::<RequestConnection>()
+            .add_network_event::<UpdatePlayers>()
+            .init_resource::<AllPlayers>();
+    }
+}
+
+#[derive(Event, Deserialize, Serialize)]
+/// The message sent by the client to the server to request a connection.
+pub struct RequestConnection {
+    /// The name of the player.
+    pub name: String,
+}
+
+#[derive(Event, Deserialize, Serialize)]
+/// The message sent by the server to all clients when a new player joins.
+pub struct UpdatePlayers {
+    /// All players in the game.
+    pub players: AllPlayers,
+}
diff --git a/crates/border-wars/src/lib.rs b/crates/border-wars/src/lib.rs
index 257aefb..2a298f3 100644
--- a/crates/border-wars/src/lib.rs
+++ b/crates/border-wars/src/lib.rs
@@ -3,6 +3,7 @@
 use bevy::prelude::*;
 
 pub mod camera;
+pub mod connection;
 pub mod map;
 pub mod responsive_scale;
 pub mod scenes;
@@ -14,9 +15,16 @@ pub enum CurrentScene {
     #[default]
     Menu,
 
-    /// When we are in the lobby waiting for players to join the game.
+    /// When you are the host in the lobby waiting for players to join the game.
     Lobby,
 
+    /// When you are the player waiting for the host to start.
+    JoinMenu,
+
     /// When we play this wonderful game.
     Game,
 }
+
+/// The name of the player.
+#[derive(Resource, Clone, Default)]
+pub struct PlayerName(pub String);
diff --git a/crates/border-wars/src/main.rs b/crates/border-wars/src/main.rs
index cc2c72e..4a6df7a 100644
--- a/crates/border-wars/src/main.rs
+++ b/crates/border-wars/src/main.rs
@@ -1,7 +1,9 @@
 //! The main entry point of the game.
 
+use bevnet::NetworkPlugin;
 use bevy::prelude::*;
 use border_wars::camera::CameraPlugin;
+use border_wars::connection::ConnectionPlugin;
 use border_wars::map::click_tile::TilesClickable;
 use border_wars::map::renderer::RendererPlugin;
 use border_wars::scenes::ScenesPlugin;
@@ -13,5 +15,7 @@ fn main() {
         .add_plugins(RendererPlugin)
         .add_plugins(CameraPlugin)
         .add_plugins(TilesClickable)
+        .add_plugins(NetworkPlugin::new("relay.cocosol.fr".to_string()))
+        .add_plugins(ConnectionPlugin)
         .run();
 }
diff --git a/crates/border-wars/src/scenes/join_menu.rs b/crates/border-wars/src/scenes/join_menu.rs
new file mode 100644
index 0000000..9107477
--- /dev/null
+++ b/crates/border-wars/src/scenes/join_menu.rs
@@ -0,0 +1,52 @@
+//! The lobby of the game.
+
+use std::collections::HashMap;
+
+use bevnet::{Connection, Receive, SendTo, Uuid};
+use bevy::prelude::*;
+use bevy_egui::{egui, EguiContexts};
+
+use crate::connection::{AllPlayers, RequestConnection, UpdatePlayers};
+use crate::{CurrentScene, PlayerName};
+
+/// The plugin for the lobby.
+pub struct JoinMenuPlugin;
+
+impl Plugin for JoinMenuPlugin {
+    fn build(&self, app: &mut App) {
+        app.add_systems(
+            Update,
+            (menu_ui, update_players).run_if(in_state(CurrentScene::JoinMenu)),
+        );
+    }
+}
+
+/// Display the UI of the lobby.
+fn menu_ui(mut ctx: EguiContexts, all_players: Res<AllPlayers>) {
+    egui::CentralPanel::default().show(ctx.ctx_mut(), |ui| {
+        ui.heading("Border Wars");
+
+        ui.separator();
+
+        for player in all_players.0.values() {
+            ui.horizontal(|ui| {
+                ui.label(player.to_string());
+            });
+        }
+    });
+}
+
+fn update_players(
+    mut event_reader: EventReader<Receive<UpdatePlayers>>,
+    mut all_players: ResMut<AllPlayers>,
+    name: Res<PlayerName>,
+    mut next_scene: ResMut<NextState<CurrentScene>>,
+) {
+    for event in event_reader.read() {
+        println!(
+            "{:?}",
+            event.1.players.0.values().into_iter().collect::<Vec<_>>()
+        );
+        *all_players = event.1.players.clone();
+    }
+}
diff --git a/crates/border-wars/src/scenes/lobby.rs b/crates/border-wars/src/scenes/lobby.rs
index 84a0348..2c23940 100644
--- a/crates/border-wars/src/scenes/lobby.rs
+++ b/crates/border-wars/src/scenes/lobby.rs
@@ -1,21 +1,33 @@
 //! The lobby of the game.
 
+use std::collections::HashMap;
+
+use bevnet::{Connection, Receive, SendTo, Uuid};
 use bevy::prelude::*;
 use bevy_egui::{egui, EguiContexts};
 
-use crate::CurrentScene;
+use crate::connection::{AllPlayers, RequestConnection, UpdatePlayers};
+use crate::{CurrentScene, PlayerName};
 
 /// The plugin for the lobby.
 pub struct LobbyPlugin;
 
 impl Plugin for LobbyPlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Update, lobby_ui.run_if(in_state(CurrentScene::Lobby)));
+        app.add_systems(Update, lobby_ui.run_if(in_state(CurrentScene::Lobby)))
+            .add_systems(
+                Update,
+                handle_connection.run_if(in_state(CurrentScene::Lobby)),
+            );
     }
 }
 
 /// Display the UI of the lobby.
-fn lobby_ui(mut ctx: EguiContexts, mut next_scene: ResMut<NextState<CurrentScene>>) {
+fn lobby_ui(
+    mut ctx: EguiContexts,
+    mut next_scene: ResMut<NextState<CurrentScene>>,
+    connection_string: Res<Connection>,
+) {
     egui::CentralPanel::default().show(ctx.ctx_mut(), |ui| {
         ui.heading("Border Wars");
 
@@ -25,7 +37,7 @@ fn lobby_ui(mut ctx: EguiContexts, mut next_scene: ResMut<NextState<CurrentScene
         ui.horizontal(|ui| {
             ui.label("Game ID: ");
             // TODO : get the game ID and display it.
-            ui.label("connection_string");
+            ui.text_edit_singleline(&mut connection_string.identifier().unwrap().to_string());
         });
 
         ui.separator();
@@ -36,3 +48,25 @@ fn lobby_ui(mut ctx: EguiContexts, mut next_scene: ResMut<NextState<CurrentScene
         }
     });
 }
+
+fn handle_connection(
+    mut event_reader: EventReader<Receive<RequestConnection>>,
+    mut event_writer: EventWriter<SendTo<UpdatePlayers>>,
+    mut all_players: ResMut<AllPlayers>,
+) {
+    for event in event_reader.read() {
+        if !all_players.0.contains_key(&event.1.name) {
+            all_players.0.insert(event.1.name.clone(), event.0);
+            println!("yes");
+        }
+        for player in all_players.0.values() {
+            println!("{:?}", player);
+            event_writer.send(SendTo(
+                *player,
+                UpdatePlayers {
+                    players: all_players.clone(),
+                },
+            ));
+        }
+    }
+}
diff --git a/crates/border-wars/src/scenes/menu.rs b/crates/border-wars/src/scenes/menu.rs
index c5c84c7..a730608 100644
--- a/crates/border-wars/src/scenes/menu.rs
+++ b/crates/border-wars/src/scenes/menu.rs
@@ -1,23 +1,30 @@
 //! The main menu of the game.
 
+use bevnet::{Connection, SendTo, Uuid};
 use bevy::prelude::*;
 use bevy_egui::{egui, EguiContexts};
 
-use crate::CurrentScene;
+use crate::connection::RequestConnection;
+use crate::{CurrentScene, PlayerName};
+
+type Name = String;
 
 /// The plugin for the menu.
 pub struct MenuPlugin;
 
 impl Plugin for MenuPlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Update, menu_ui.run_if(in_state(CurrentScene::Menu)));
+        app.init_resource::<PlayerName>()
+            .add_systems(Update, menu_ui.run_if(in_state(CurrentScene::Menu)));
     }
 }
 /// Display the UI of the menu to host a game or join one.
 fn menu_ui(
     mut ctx: EguiContexts,
     mut connection_string: Local<String>,
+    mut name: ResMut<PlayerName>,
     mut next_scene: ResMut<NextState<CurrentScene>>,
+    mut event: EventWriter<SendTo<RequestConnection>>,
 ) {
     egui::CentralPanel::default().show(ctx.ctx_mut(), |ui| {
         ui.heading("Border Wars");
@@ -26,12 +33,22 @@ fn menu_ui(
 
         ui.label("Connect to an existing game:");
         ui.horizontal(|ui| {
+            ui.label("name: ");
+            ui.text_edit_singleline(&mut name.0);
+            ui.separator();
+
             ui.label("Game ID: ");
             ui.text_edit_singleline(&mut *connection_string);
 
             if ui.button("Join").clicked() {
-                next_scene.set(CurrentScene::Game);
-                // TODO: connect to the game
+                next_scene.set(CurrentScene::JoinMenu);
+
+                event.send(SendTo {
+                    0: Uuid::parse_str(&connection_string).unwrap(),
+                    1: RequestConnection {
+                        name: (*name.0).to_string(),
+                    },
+                })
             }
         });
 
@@ -39,7 +56,6 @@ fn menu_ui(
 
         if ui.button("Create new game").clicked() {
             next_scene.set(CurrentScene::Lobby);
-            // TODO: create a new game
         }
     });
 }
diff --git a/crates/border-wars/src/scenes/mod.rs b/crates/border-wars/src/scenes/mod.rs
index da18601..7427dee 100644
--- a/crates/border-wars/src/scenes/mod.rs
+++ b/crates/border-wars/src/scenes/mod.rs
@@ -5,6 +5,7 @@ use bevy_egui::EguiPlugin;
 
 use crate::{responsive_scale, CurrentScene};
 
+pub mod join_menu;
 pub mod lobby;
 pub mod menu;
 
@@ -17,6 +18,7 @@ impl Plugin for ScenesPlugin {
             .add_state::<CurrentScene>()
             .add_plugins(menu::MenuPlugin)
             .add_plugins(lobby::LobbyPlugin)
+            .add_plugins(join_menu::JoinMenuPlugin)
             .add_plugins(responsive_scale::ResponsiveScalingPlugin);
     }
 }