diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
new file mode 100644
index 0000000..797acea
--- /dev/null
+++ b/.idea/runConfigurations.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/Assignment 4/src/ca/cosc3p91/a4/game/GameEngine.java b/Assignment 4/src/ca/cosc3p91/a4/game/GameEngine.java
index 1ae1fca..b5240df 100644
--- a/Assignment 4/src/ca/cosc3p91/a4/game/GameEngine.java	
+++ b/Assignment 4/src/ca/cosc3p91/a4/game/GameEngine.java	
@@ -139,7 +139,7 @@ public class GameEngine {
         return score;
     }
 
-    public void updateMap(Map map) {
+    public synchronized void updateMap(Map map) {
         for (int i = 0; i < map.contains.size(); i++) {
             if ((map.contains.get(i) instanceof ResourceBuilding)) {
                 ((ResourceBuilding) map.contains.get(i)).update(map.getTownHall());
@@ -147,7 +147,7 @@ public class GameEngine {
         }
     }
 
-    public boolean build (Map map, String buildingArg) {
+    public synchronized boolean build (Map map, String buildingArg) {
         BuildingFactory bfactory = new BuildingFactory();
         Building type = bfactory.getBuilding(buildingArg);
         return map.build(new Tile(), type);
@@ -159,7 +159,7 @@ public class GameEngine {
         return  map.train(type);
     }
 
-    public boolean upgradeBuilding (Map map, int buildingIndex) {
+    public synchronized boolean upgradeBuilding (Map map, int buildingIndex) {
         return map.upgradeBuilding(buildingIndex);
     }
 
diff --git a/Assignment 4/src/ca/cosc3p91/a4/util/network/Client.java b/Assignment 4/src/ca/cosc3p91/a4/util/network/Client.java
index 5b33716..8b1f9d8 100644
--- a/Assignment 4/src/ca/cosc3p91/a4/util/network/Client.java	
+++ b/Assignment 4/src/ca/cosc3p91/a4/util/network/Client.java	
@@ -36,7 +36,23 @@ public class Client implements Runnable {
                     continue;
                 if (prompt.charAt(0) == '6')
                     break;
-
+                switch (prompt.charAt(0)) {
+                    case '1':
+                        Message.Sent buildMessage = new Message.Sent(PacketTable.BUILD,0,++lastMessageID);
+                        buildMessage.getData().write(prompt.substring(1).getBytes());
+                        sendMessage(buildMessage);
+                        break;
+                    case '2':
+                        Message.Sent trainMessage = new Message.Sent(PacketTable.TRAIN,0,++lastMessageID);
+                        trainMessage.getData().write(prompt.substring(1).getBytes());
+                        sendMessage(trainMessage);
+                        break;
+                    case '3':
+                        Message.Sent upgradeMessage = new Message.Sent(PacketTable.UPGRADE,0,++lastMessageID);
+                        upgradeMessage.getData().write(prompt.substring(1).getBytes());
+                        sendMessage(upgradeMessage);
+                        break;
+                }
 
                 view.printGameMenu();
             }
diff --git a/Assignment 4/src/ca/cosc3p91/a4/util/network/PacketTable.java b/Assignment 4/src/ca/cosc3p91/a4/util/network/PacketTable.java
index a97bdaf..eab7859 100644
--- a/Assignment 4/src/ca/cosc3p91/a4/util/network/PacketTable.java	
+++ b/Assignment 4/src/ca/cosc3p91/a4/util/network/PacketTable.java	
@@ -16,7 +16,13 @@ public class PacketTable {
     public static final byte ACK = 0x3;
     // messageHeader, UTF8 String with length information (use DOS.writeUTF/DIS.readUTF)
     public static final byte MESSAGE = 0x4;
+    // messageHeader, build
+    public static final byte BUILD = 0x5;
+    // messageHeader, train
+    public static final byte TRAIN = 0x6;
+    // messageHeader, upgrade
+    public static final byte UPGRADE = 0x7;
     // messageHeader, serial packets with map info
-    public static final byte MAP_DATA = 0x5;
+    public static final byte USER_MAP_DATA = 0x8;
 
 }