diff --git a/MultiversalDiplomacy/Adjudicate/Decision/AdjudicationDecision.cs b/MultiversalDiplomacy/Adjudicate/Decision/AdjudicationDecision.cs
new file mode 100644
index 0000000..2e365e1
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/AdjudicationDecision.cs
@@ -0,0 +1,12 @@
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+/// <summary>
+/// Base class for adjudication decisions. The decision-based adjudication algorithm is based
+/// on DATC section 5 and "The Math of Adjudication" by Lucas Kruijswijk, respectively found at
+/// http://web.inter.nl.net/users/L.B.Kruijswijk/#5 and
+/// http://uk.diplom.org/pouch/Zine/S2009M/Kruijswijk/DipMath_Chp1.htm
+/// </summary>
+public abstract class AdjudicationDecision
+{
+    public abstract bool Resolved { get; }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/AttackStrength.cs b/MultiversalDiplomacy/Adjudicate/Decision/AttackStrength.cs
new file mode 100644
index 0000000..ca9dc9d
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/AttackStrength.cs
@@ -0,0 +1,17 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class AttackStrength : NumericAdjudicationDecision
+{
+    public MoveOrder Order { get; }
+    public List<SupportMoveOrder> Supports { get; }
+    public MoveOrder? OpposingMove { get; }
+
+    public AttackStrength(MoveOrder order, IEnumerable<SupportMoveOrder> supports, MoveOrder? opposingMove = null)
+    {
+        this.Order = order;
+        this.Supports = supports.ToList();
+        this.OpposingMove = opposingMove;
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/BinaryAdjudicationDecision.cs b/MultiversalDiplomacy/Adjudicate/Decision/BinaryAdjudicationDecision.cs
new file mode 100644
index 0000000..65e6084
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/BinaryAdjudicationDecision.cs
@@ -0,0 +1,24 @@
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public abstract class BinaryAdjudicationDecision : AdjudicationDecision
+{
+    public bool? Outcome { get; private set; } = null;
+
+    public override bool Resolved => this.Outcome != null;
+
+    public bool Update(bool outcome)
+    {
+        if (this.Outcome == null)
+        {
+            this.Outcome = outcome;
+            return true;
+        }
+        if (this.Outcome != outcome)
+        {
+            string name = this.GetType().Name;
+            throw new ArgumentException(
+                $"Cannot reverse adjudication of {name} from {this.Outcome} to {outcome}");
+        }
+        return false;
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/DefendStrength.cs b/MultiversalDiplomacy/Adjudicate/Decision/DefendStrength.cs
new file mode 100644
index 0000000..b51532f
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/DefendStrength.cs
@@ -0,0 +1,15 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class DefendStrength : NumericAdjudicationDecision
+{
+    public MoveOrder Order { get; }
+    public List<SupportMoveOrder> Supports { get; }
+
+    public DefendStrength(MoveOrder order, IEnumerable<SupportMoveOrder> supports)
+    {
+        this.Order = order;
+        this.Supports = supports.ToList();
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/DoesMove.cs b/MultiversalDiplomacy/Adjudicate/Decision/DoesMove.cs
new file mode 100644
index 0000000..c093871
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/DoesMove.cs
@@ -0,0 +1,17 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class DoesMove : BinaryAdjudicationDecision
+{
+    public MoveOrder Order { get; }
+    public MoveOrder? OpposingMove { get; }
+    public List<MoveOrder> Competing { get; }
+
+    public DoesMove(MoveOrder order, MoveOrder? opposingMove, IEnumerable<MoveOrder> competing)
+    {
+        this.Order = order;
+        this.OpposingMove = opposingMove;
+        this.Competing = competing.ToList();
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/GivesSupport.cs b/MultiversalDiplomacy/Adjudicate/Decision/GivesSupport.cs
new file mode 100644
index 0000000..d0095f5
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/GivesSupport.cs
@@ -0,0 +1,15 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class GivesSupport : BinaryAdjudicationDecision
+{
+    public SupportOrder Order { get; }
+    public List<MoveOrder> Cuts { get; }
+
+    public GivesSupport(SupportOrder order, IEnumerable<MoveOrder> cuts)
+    {
+        this.Order = order;
+        this.Cuts = cuts.ToList();
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/HasPath.cs b/MultiversalDiplomacy/Adjudicate/Decision/HasPath.cs
new file mode 100644
index 0000000..71f49fe
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/HasPath.cs
@@ -0,0 +1,13 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class HasPath : BinaryAdjudicationDecision
+{
+    public MoveOrder Order { get; }
+
+    public HasPath(MoveOrder order)
+    {
+        this.Order = order;
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/HoldStrength.cs b/MultiversalDiplomacy/Adjudicate/Decision/HoldStrength.cs
new file mode 100644
index 0000000..35d1d46
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/HoldStrength.cs
@@ -0,0 +1,18 @@
+using MultiversalDiplomacy.Model;
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class HoldStrength : NumericAdjudicationDecision
+{
+    public Province Province { get; }
+    public UnitOrder? Order { get; }
+    public List<SupportHoldOrder> Supports { get; }
+
+    public HoldStrength(Province province, UnitOrder? order = null)
+    {
+        this.Province = province;
+        this.Order = order;
+        this.Supports = new();
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/IsDislodged.cs b/MultiversalDiplomacy/Adjudicate/Decision/IsDislodged.cs
new file mode 100644
index 0000000..f5cdf62
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/IsDislodged.cs
@@ -0,0 +1,15 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class IsDislodged : BinaryAdjudicationDecision
+{
+    public UnitOrder Order { get; }
+    public List<MoveOrder> Incoming { get; }
+
+    public IsDislodged(UnitOrder order, IEnumerable<MoveOrder> incoming)
+    {
+        this.Order = order;
+        this.Incoming = incoming.ToList();
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/NumericAdjudicationDecision.cs b/MultiversalDiplomacy/Adjudicate/Decision/NumericAdjudicationDecision.cs
new file mode 100644
index 0000000..05e0681
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/NumericAdjudicationDecision.cs
@@ -0,0 +1,24 @@
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public abstract class NumericAdjudicationDecision : AdjudicationDecision
+{
+    public int MinValue { get; private set; } = 0;
+    public int MaxValue { get; private set; } = 99;
+
+    public override bool Resolved => this.MinValue == this.MaxValue;
+
+    public bool Update(int min, int max)
+    {
+        if (min < this.MinValue || max > this.MaxValue)
+        {
+            string name = this.GetType().Name;
+            throw new ArgumentException(
+                $"Cannot reverse adjudication of {name} from ({this.MinValue},{this.MaxValue})"
+                + $" to ({min},{max})");
+        }
+        bool updated = this.MinValue != min || this.MaxValue != max;
+        this.MinValue = min;
+        this.MaxValue = max;
+        return updated;
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/Decision/PreventStrength.cs b/MultiversalDiplomacy/Adjudicate/Decision/PreventStrength.cs
new file mode 100644
index 0000000..4a5ed2e
--- /dev/null
+++ b/MultiversalDiplomacy/Adjudicate/Decision/PreventStrength.cs
@@ -0,0 +1,17 @@
+using MultiversalDiplomacy.Orders;
+
+namespace MultiversalDiplomacy.Adjudicate.Decision;
+
+public class PreventStrength : NumericAdjudicationDecision
+{
+    public MoveOrder Order { get; }
+    public List<SupportMoveOrder> Supports { get; }
+    public MoveOrder? OpposingMove { get; }
+
+    public PreventStrength(MoveOrder order, IEnumerable<SupportMoveOrder> supports, MoveOrder? opposingMove = null)
+    {
+        this.Order = order;
+        this.Supports = supports.ToList();
+        this.OpposingMove = opposingMove;
+    }
+}
diff --git a/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs b/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs
index 4d5411a..0799d0a 100644
--- a/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs
+++ b/MultiversalDiplomacy/Adjudicate/MovementPhaseAdjudicator.cs
@@ -1,3 +1,4 @@
+using MultiversalDiplomacy.Adjudicate.Decision;
 using MultiversalDiplomacy.Model;
 using MultiversalDiplomacy.Orders;
 
@@ -8,165 +9,6 @@ namespace MultiversalDiplomacy.Adjudicate;
 /// </summary>
 public class MovementPhaseAdjudicator : IPhaseAdjudicator
 {
-    /// <summary>
-    /// Base class for adjudication decisions. The decision-based adjudication algorithm is based
-    /// on DATC section 5 and "The Math of Adjudication" by Lucas Kruijswijk, respectively found at
-    /// http://web.inter.nl.net/users/L.B.Kruijswijk/#5 and
-    /// http://uk.diplom.org/pouch/Zine/S2009M/Kruijswijk/DipMath_Chp1.htm
-    /// </summary>
-    private abstract class AdjudicationDecision
-    {
-        public abstract bool Resolved { get; }
-    }
-
-    private abstract class BinaryAdjudicationDecision : AdjudicationDecision
-    {
-        public bool? Outcome { get; private set; } = null;
-
-        public override bool Resolved => this.Outcome != null;
-
-        public bool Update(bool outcome)
-        {
-            if (this.Outcome == null)
-            {
-                this.Outcome = outcome;
-                return true;
-            }
-            if (this.Outcome != outcome)
-            {
-                string name = this.GetType().Name;
-                throw new ArgumentException(
-                    $"Cannot reverse adjudication of {name} from {this.Outcome} to {outcome}");
-            }
-            return false;
-        }
-    }
-
-    private abstract class NumericAdjudicationDecision : AdjudicationDecision
-    {
-        public int MinValue { get; private set; } = 0;
-        public int MaxValue { get; private set; } = 99;
-
-        public override bool Resolved => this.MinValue == this.MaxValue;
-
-        public bool Update(int min, int max)
-        {
-            if (min < this.MinValue || max > this.MaxValue)
-            {
-                string name = this.GetType().Name;
-                throw new ArgumentException(
-                    $"Cannot reverse adjudication of {name} from ({this.MinValue},{this.MaxValue})"
-                    + $" to ({min},{max})");
-            }
-            bool updated = this.MinValue != min || this.MaxValue != max;
-            this.MinValue = min;
-            this.MaxValue = max;
-            return updated;
-        }
-    }
-
-    private class IsDislodged : BinaryAdjudicationDecision
-    {
-        public UnitOrder Order { get; }
-        public List<MoveOrder> Incoming { get; }
-
-        public IsDislodged(UnitOrder order, IEnumerable<MoveOrder> incoming)
-        {
-            this.Order = order;
-            this.Incoming = incoming.ToList();
-        }
-    }
-
-    private class HasPath : BinaryAdjudicationDecision
-    {
-        public MoveOrder Order { get; }
-
-        public HasPath(MoveOrder order)
-        {
-            this.Order = order;
-        }
-    }
-
-    private class GivesSupport : BinaryAdjudicationDecision
-    {
-        public SupportOrder Order { get; }
-        public List<MoveOrder> Cuts { get; }
-
-        public GivesSupport(SupportOrder order, IEnumerable<MoveOrder> cuts)
-        {
-            this.Order = order;
-            this.Cuts = cuts.ToList();
-        }
-    }
-
-    private class HoldStrength : NumericAdjudicationDecision
-    {
-        public Province Province { get; }
-        public UnitOrder? Order { get; }
-        public List<SupportHoldOrder> Supports { get; }
-
-        public HoldStrength(Province province, UnitOrder? order = null)
-        {
-            this.Province = province;
-            this.Order = order;
-            this.Supports = new();
-        }
-    }
-
-    private class AttackStrength : NumericAdjudicationDecision
-    {
-        public MoveOrder Order { get; }
-        public List<SupportMoveOrder> Supports { get; }
-        public MoveOrder? OpposingMove { get; }
-
-        public AttackStrength(MoveOrder order, IEnumerable<SupportMoveOrder> supports, MoveOrder? opposingMove = null)
-        {
-            this.Order = order;
-            this.Supports = supports.ToList();
-            this.OpposingMove = opposingMove;
-        }
-    }
-
-    private class DefendStrength : NumericAdjudicationDecision
-    {
-        public MoveOrder Order { get; }
-        public List<SupportMoveOrder> Supports { get; }
-
-        public DefendStrength(MoveOrder order, IEnumerable<SupportMoveOrder> supports)
-        {
-            this.Order = order;
-            this.Supports = supports.ToList();
-        }
-    }
-
-    private class PreventStrength : NumericAdjudicationDecision
-    {
-        public MoveOrder Order { get; }
-        public List<SupportMoveOrder> Supports { get; }
-        public MoveOrder? OpposingMove { get; }
-
-        public PreventStrength(MoveOrder order, IEnumerable<SupportMoveOrder> supports, MoveOrder? opposingMove = null)
-        {
-            this.Order = order;
-            this.Supports = supports.ToList();
-            this.OpposingMove = opposingMove;
-        }
-    }
-
-    private class DoesMove : BinaryAdjudicationDecision
-    {
-        public MoveOrder Order { get; }
-        public MoveOrder? OpposingMove { get; }
-        public List<MoveOrder> Competing { get; }
-
-        public DoesMove(MoveOrder order, MoveOrder? opposingMove, IEnumerable<MoveOrder> competing)
-        {
-            this.Order = order;
-            this.OpposingMove = opposingMove;
-            this.Competing = competing.ToList();
-        }
-    }
-
     private class Decisions
     {
         public Dictionary<Unit, IsDislodged> IsDislodged { get; }