diff --git a/MultiversalDiplomacy/Script/GameScriptHandler.cs b/MultiversalDiplomacy/Script/GameScriptHandler.cs
new file mode 100644
index 0000000..7db394c
--- /dev/null
+++ b/MultiversalDiplomacy/Script/GameScriptHandler.cs
@@ -0,0 +1,43 @@
+using MultiversalDiplomacy.Model;
+
+namespace MultiversalDiplomacy.Script;
+
+public class GameScriptHandler(World world, bool strict = false) : IScriptHandler
+{
+    public string Prompt => "game> ";
+
+    public World World { get; private set; } = world;
+
+    /// <summary>
+    /// Whether unsuccessful commands should terminate the script.
+    /// </summary>
+    public bool Strict { get; } = strict;
+
+    private string? CurrentPower = null;
+
+    public IScriptHandler? HandleInput(string input)
+    {
+        if (input == "") {
+            CurrentPower = null;
+            return this;
+        }
+
+        // --- submits the orders for validation to allow for assertions about it
+        if (input == "---") {
+            // TODO submit orders
+            // TODO return a new handler that handles asserts
+        }
+
+        // A block of orders for a single power beginning with "{name}:"
+        if (World.Powers.FirstOrDefault(p => input.EqualsAnyCase($"{p}:"), null) is string power) {
+            CurrentPower = power;
+            return this;
+        }
+
+        // TODO parse order, including "{power} {order}" for one-offs
+
+        Console.WriteLine($"{CurrentPower}: {input}");
+
+        return this;
+    }
+}
diff --git a/MultiversalDiplomacy/Script/SetupScriptHandler.cs b/MultiversalDiplomacy/Script/SetupScriptHandler.cs
index 19ae3ed..40e517b 100644
--- a/MultiversalDiplomacy/Script/SetupScriptHandler.cs
+++ b/MultiversalDiplomacy/Script/SetupScriptHandler.cs
@@ -32,7 +32,7 @@ public class SetupScriptHandler(World world, bool strict = false) : IScriptHandl
             case "help":
             case "?":
                 Console.WriteLine("commands:");
-                Console.WriteLine("  begin: complete setup and start the game");
+                Console.WriteLine("  begin: complete setup and start the game (alias: ---)");
                 Console.WriteLine("  list <type>: list things in a game category");
                 Console.WriteLine("  option <name> <value>: set a game option");
                 Console.WriteLine("  unit <power> <type> <province> [location]: add a unit to the game");
@@ -40,7 +40,8 @@ public class SetupScriptHandler(World world, bool strict = false) : IScriptHandl
                 break;
 
             case "begin":
-                return null; // TODO
+            case "---":
+                return new GameScriptHandler(World, Strict);
 
             case "list" when args.Length == 1:
                 Console.WriteLine("usage:");
diff --git a/MultiversalDiplomacyTests/DATC_A.cs b/MultiversalDiplomacyTests/DATC_A.cs
index f55de6c..e0068fa 100644
--- a/MultiversalDiplomacyTests/DATC_A.cs
+++ b/MultiversalDiplomacyTests/DATC_A.cs
@@ -1,8 +1,6 @@
 using MultiversalDiplomacy.Adjudicate;
-using MultiversalDiplomacy.Adjudicate.Decision;
 using MultiversalDiplomacy.Model;
 using MultiversalDiplomacy.Orders;
-
 using NUnit.Framework;
 
 namespace MultiversalDiplomacyTests;
diff --git a/MultiversalDiplomacyTests/MultiversalDiplomacyTests.csproj b/MultiversalDiplomacyTests/MultiversalDiplomacyTests.csproj
index f9ccbde..7f04bc4 100644
--- a/MultiversalDiplomacyTests/MultiversalDiplomacyTests.csproj
+++ b/MultiversalDiplomacyTests/MultiversalDiplomacyTests.csproj
@@ -18,4 +18,10 @@
     <PackageReference Include="coverlet.collector" Version="3.1.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Content Include="Scripts/**/*.txt">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
 </Project>
diff --git a/MultiversalDiplomacyTests/ScriptTests.cs b/MultiversalDiplomacyTests/ScriptTests.cs
new file mode 100644
index 0000000..e173a4a
--- /dev/null
+++ b/MultiversalDiplomacyTests/ScriptTests.cs
@@ -0,0 +1,28 @@
+using NUnit.Framework;
+
+using MultiversalDiplomacy.Model;
+using MultiversalDiplomacy.Script;
+
+namespace MultiversalDiplomacyTests;
+
+public class ScriptTests
+{
+    static IEnumerable<TestCaseData> DatcTestCases()
+    {
+        foreach (var path in Directory.EnumerateFiles("Scripts/DATC"))
+        {
+            yield return new TestCaseData(path)
+                .SetName($"{{m}}({Path.GetFileNameWithoutExtension(path)})");
+        }
+    }
+
+    [TestCaseSource(nameof(DatcTestCases))]
+    public void Test_DATC(string testScriptPath)
+    {
+        IScriptHandler? handler = new SetupScriptHandler(World.WithStandardMap(), strict: true);
+        foreach (string input in File.ReadAllLines(testScriptPath)) {
+            handler = handler?.HandleInput(input);
+            Assert.That(handler, Is.Not.Null, $"Script quit unexpectedly at \"{input}\"");
+        }
+    }
+}
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.1.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.1.txt
new file mode 100644
index 0000000..3352544
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.1.txt
@@ -0,0 +1,14 @@
+# 6.A.1. TEST CASE, MOVING TO AN AREA THAT IS NOT A NEIGHBOUR
+# Check if an illegal move (without convoy) will fail.
+
+unit England F North Sea
+
+---
+
+England:
+F North Sea - Picardy
+
+---
+
+# Order should fail.
+assert North Sea holds
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.2.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.2.txt
new file mode 100644
index 0000000..527d035
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.2.txt
@@ -0,0 +1,14 @@
+# 6.A.2. TEST CASE, MOVE ARMY TO SEA
+# Check if an army could not be moved to open sea.
+
+unit England A Liverpool
+
+---
+
+England:
+A Liverpool - Irish Sea
+
+---
+
+# Order should fail.
+assert Liverpool holds
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.3.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.3.txt
new file mode 100644
index 0000000..d160bef
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.3.txt
@@ -0,0 +1,14 @@
+# 6.A.3. TEST CASE, MOVE FLEET TO LAND
+# Check whether a fleet cannot move to land.
+
+unit Germany Army Kiel
+
+---
+
+Germany:
+F Kiel - Munich
+
+---
+
+# Order should fail.
+assert Kiel holds
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.4.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.4.txt
new file mode 100644
index 0000000..3ff5c48
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.4.txt
@@ -0,0 +1,14 @@
+# 6.A.4. TEST CASE, MOVE TO OWN SECTOR
+# Moving to the same sector is an illegal move (2023 rulebook, page 7, "An Army can be ordered to move into an adjacent inland or coastal province.").
+
+unit Germany Army Kiel
+
+---
+
+Germany:
+F Kiel - Kiel
+
+---
+
+# Program should not crash.
+assert Kiel holds
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.5.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.5.txt
new file mode 100644
index 0000000..8eb3c6b
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.5.txt
@@ -0,0 +1,31 @@
+# 6.A.5. TEST CASE, MOVE TO OWN SECTOR WITH CONVOY
+# Moving to the same sector is still illegal with convoy (2023 rulebook, page 7, "Note: An Army can move across water provinces from one coastal province to another...").
+
+unit England F North Sea
+unit England A Yorkshire
+unit England A Liverpool
+unit Germany F London
+unit Germany A Wales
+
+---
+
+England:
+F North Sea Convoys A Yorkshire - Yorkshire
+A Yorkshire - Yorkshire
+A Liverpool Supports A Yorkshire - Yorkshire
+
+Germany:
+F London - Yorkshire
+A Wales Supports F London - Yorkshire
+
+---
+
+# The move of the army in Yorkshire is illegal.
+assert Yorkshire holds
+# This makes the support of Liverpool also illegal and without the support, the Germans have a stronger force.
+assert North Sea holds
+assert Liverpool holds
+assert London moves
+# The army in London dislodges the army in Yorkshire.
+assert Wales supports
+assert Yorkshire dislodged
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.6.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.6.txt
new file mode 100644
index 0000000..cc01be9
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.6.txt
@@ -0,0 +1,16 @@
+# 6.A.6. TEST CASE, ORDERING A UNIT OF ANOTHER COUNTRY
+# Check whether someone cannot order a unit that is not his own unit.
+
+unit England F London
+# A German unit is included here so Germany isn't considered dead
+unit Germany A Munich
+
+---
+
+Germany:
+F London - North Sea
+
+---
+
+# Order should fail.
+assert London holds
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/6.A.7.txt b/MultiversalDiplomacyTests/Scripts/DATC/6.A.7.txt
new file mode 100644
index 0000000..3057bde
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/6.A.7.txt
@@ -0,0 +1,16 @@
+# 6.A.7. TEST CASE, ONLY ARMIES CAN BE CONVOYED
+# A fleet cannot be convoyed.
+
+unit England F London
+unit England North Sea
+
+---
+
+England:
+F London - Belgium
+F North Sea Convoys A London - Belgium
+
+---
+
+# Move from London to Belgium should fail.
+assert London holds
diff --git a/MultiversalDiplomacyTests/Scripts/DATC/README.md b/MultiversalDiplomacyTests/Scripts/DATC/README.md
new file mode 100644
index 0000000..ff3d741
--- /dev/null
+++ b/MultiversalDiplomacyTests/Scripts/DATC/README.md
@@ -0,0 +1,3 @@
+# DATC test scripts
+
+These test scripts are copied from DATC v3.1.