diff --git a/MultiversalDiplomacy/Adjudicate/IPhaseAdjudicator.cs b/MultiversalDiplomacy/Adjudicate/IPhaseAdjudicator.cs
index 5ab155a..6a1c5cf 100644
--- a/MultiversalDiplomacy/Adjudicate/IPhaseAdjudicator.cs
+++ b/MultiversalDiplomacy/Adjudicate/IPhaseAdjudicator.cs
@@ -8,6 +8,18 @@ namespace MultiversalDiplomacy.Adjudicate;
 /// </summary>
 public interface IPhaseAdjudicator
 {
+    /// <summary>
+    /// Given a list of order sets, determine which entries are comprehensible as orders.
+    /// An order set entry may comprehensible as an order but not valid for the current
+    /// phase; these orders will be rejected by <see cref="ValidateOrders"/>.
+    /// </summary>
+    /// <param name="world">The global game state.</param>
+    /// <param name="orderSets">The order sets to adjudicate.</param>
+    /// <returns>
+    /// A list of <see cref="Order"/> objects representing the orders parsed.
+    /// </returns>
+    public List<Order> ParseOrderSets(World world, List<OrderSet> orderSets);
+
     /// <summary>
     /// Given a list of orders, determine which orders are valid for this adjudicator and
     /// which should be rejected before adjudication. Adjudication should be performed on
diff --git a/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs b/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs
index bc675c7..34bec81 100644
--- a/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs
+++ b/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs
@@ -19,6 +19,11 @@ public class MovementPhaseAdjudicator : IPhaseAdjudicator
         this.logger = logger;
     }
 
+    public List<Order> ParseOrderSets(World world, List<OrderSet> orderSets)
+    {
+        throw new NotImplementedException();
+    }
+
     public List<OrderValidation> ValidateOrders(World world, List<Order> orders)
     {
         // The basic workflow of this function will be to look for invalid orders, remove these
diff --git a/MultiversalDiplomacy/GameController.cs b/MultiversalDiplomacy/GameController.cs
index 21864b8..c557c68 100644
--- a/MultiversalDiplomacy/GameController.cs
+++ b/MultiversalDiplomacy/GameController.cs
@@ -1,4 +1,6 @@
+using MultiversalDiplomacy.Adjudicate;
 using MultiversalDiplomacy.Model;
+using MultiversalDiplomacy.Orders;
 
 namespace MultiversalDiplomacy;
 
@@ -21,9 +23,28 @@ public static class GameController
 
     public static World AdjudicateOrders(World world)
     {
-        // TODO: Parse the order sets into orders
-        // TODO: Execute the correct adjudicator for the current world state
-        // TODO: Update the world
-        return world;
+        // Determine which phase the game is in, which determines how orders should be interpreted and adjudicated.
+        PhaseType phaseType = world.GetNextPhaseType();
+
+        IPhaseAdjudicator adjudicator = phaseType switch {
+            PhaseType.Movement => MovementPhaseAdjudicator.Instance,
+            PhaseType.Retreat => throw new NotImplementedException(),
+            PhaseType.Build => throw new NotImplementedException(),
+            PhaseType.Sustain => throw new NotImplementedException(),
+            _ => throw new InvalidOperationException(phaseType.ToString()),
+        };
+
+        // Parse the order sets into actual orders.
+        List<Order> parsedOrders = adjudicator.ParseOrderSets(world, world.OrderSets.ToList());
+
+        // Validate the orders.
+        var orderValidations = adjudicator.ValidateOrders(world, parsedOrders);
+
+        // Adjudicate the orders.
+        var validOrders = orderValidations.Where(v => v.Valid).Select(v => v.Order).ToList();
+        var results = adjudicator.AdjudicateOrders(world, validOrders);
+
+        // Update the world.
+        return adjudicator.UpdateWorld(world, results);
     }
 }
\ No newline at end of file
diff --git a/MultiversalDiplomacy/Model/Phase.cs b/MultiversalDiplomacy/Model/Phase.cs
new file mode 100644
index 0000000..3e95617
--- /dev/null
+++ b/MultiversalDiplomacy/Model/Phase.cs
@@ -0,0 +1,9 @@
+namespace MultiversalDiplomacy.Model;
+
+public enum PhaseType
+{
+    Movement = 1,
+    Retreat = 2,
+    Build = 3,
+    Sustain = 4,
+}
diff --git a/MultiversalDiplomacy/Model/World.cs b/MultiversalDiplomacy/Model/World.cs
index 0d0907d..ab9803f 100644
--- a/MultiversalDiplomacy/Model/World.cs
+++ b/MultiversalDiplomacy/Model/World.cs
@@ -309,6 +309,17 @@ public class World
         return foundUnit;
     }
 
+    public PhaseType GetNextPhaseType()
+    {
+        // TODO: Figure how to order build and sustain phases in a staggered multiverse
+        if (RetreatingUnits.Any())
+        {
+            return PhaseType.Retreat;
+        }
+
+        return PhaseType.Movement;
+    }
+
     /// <summary>
     /// The standard Diplomacy provinces.
     /// </summary>
diff --git a/MultiversalDiplomacy/Script/GameScriptHandler.cs b/MultiversalDiplomacy/Script/GameScriptHandler.cs
index 1ef0659..01a2b8a 100644
--- a/MultiversalDiplomacy/Script/GameScriptHandler.cs
+++ b/MultiversalDiplomacy/Script/GameScriptHandler.cs
@@ -30,11 +30,16 @@ public class GameScriptHandler : IScriptHandler
             case "help":
             case "?":
                 Console.WriteLine("commands:");
+                Console.WriteLine("  adjudicate: adjudicate the current orders");
                 Console.WriteLine("  list: list things in a game category");
                 Console.WriteLine("  orders: submit order sets");
                 Console.WriteLine("  status: overview of the state of the game");
                 break;
 
+            case "adjudicate":
+                World = GameController.AdjudicateOrders(World);
+                break;
+
             case "list" when args.Length == 1:
                 Console.WriteLine("usage:");
                 Console.WriteLine("  list ordersets: unadjudicated order sets");