diff --git a/EDPlayerJournal/BGS/CombatZone.cs b/EDPlayerJournal/BGS/CombatZone.cs
index 0f6fbf5..ed23054 100644
--- a/EDPlayerJournal/BGS/CombatZone.cs
+++ b/EDPlayerJournal/BGS/CombatZone.cs
@@ -3,15 +3,40 @@ using System.Linq;
 
 namespace EDPlayerJournal.BGS; 
 public class CombatZone : Transaction {
+    /// <summary>
+    /// Type string for ground combat zone
+    /// </summary>
+    public static readonly string GroundCombatZone = "Ground";
+
+    /// <summary>
+    /// Type string for ship combat zones
+    /// </summary>
+    public static readonly string ShipCombatZone = "Ship";
+
+    /// <summary>
+    /// Difficulty low
+    /// </summary>
+    public static readonly string DifficultyLow = "Low";
+
+    /// <summary>
+    /// Difficulty medium
+    /// </summary>
+    public static readonly string DifficultyMedium = "Medium";
+
+    /// <summary>
+    /// Difficulty high
+    /// </summary>
+    public static readonly string DifficultyHigh = "High";
+
     /// <summary>
     /// Type, either on foot or ship
     /// </summary>
-    public string Type { get; set; } = "Ship";
+    public string Type { get; set; } = ShipCombatZone;
 
     /// <summary>
     /// Difficulty type, low, medium or high.
     /// </summary>
-    public string Grade { get; set; } = "Low";
+    public string Grade { get; set; } = DifficultyLow;
 
     /// <summary>
     /// Whether spec ops were won.
@@ -52,14 +77,14 @@ public class CombatZone : Transaction {
     /// Returns true if it is an on foot/ground combat zone
     /// </summary>
     public bool IsGround {
-        get { return string.Compare(Type, "On Foot") == 0; }
+        get { return string.Compare(Type, GroundCombatZone) == 0; }
     }
 
     /// <summary>
     /// Returns true if it is an on foot combat zone
     /// </summary>
     public bool IsShip {
-        get { return string.Compare(Type, "Ship") == 0; }
+        get { return string.Compare(Type, ShipCombatZone) == 0; }
     }
 
     public override int CompareTo(Transaction? obj) {
diff --git a/EDPlayerJournal/BGS/TransactionParser.cs b/EDPlayerJournal/BGS/TransactionParser.cs
index 2afe1b7..3f971d6 100644
--- a/EDPlayerJournal/BGS/TransactionParser.cs
+++ b/EDPlayerJournal/BGS/TransactionParser.cs
@@ -57,7 +57,7 @@ internal class TransactionParserContext {
     public Dictionary<string, long> BuyCost = new();
 
     public void DiscernCombatZone(TransactionList transactions, Entry e) {
-        string grade = "Low";
+        string grade = CombatZone.DifficultyLow;
         string cztype;
         ulong? highest = HighestCombatBond;
 
@@ -66,40 +66,40 @@ internal class TransactionParserContext {
         }
 
         if (OnFootKills > 0) {
-            cztype = "On Foot";
+            cztype = CombatZone.GroundCombatZone;
             // High on foot combat zones have enforcers that bring 80k a pop
             if (highest >= 80000) {
-                grade = "High";
+                grade = CombatZone.DifficultyHigh;
             } else if (highest >= 40000) {
-                grade = "Medium";
+                grade = CombatZone.DifficultyMedium;
             } else {
-                grade = "Low";
+                grade = CombatZone.DifficultyLow;
             }
         } else if (ShipKills > 0) {
             // Ship combat zones can be identified by the amount of kills
             if (ShipKills > 20) {
-                grade = "High";
+                grade = CombatZone.DifficultyHigh;
             } else if (ShipKills > 10) {
-                grade = "Medium";
+                grade = CombatZone.DifficultyMedium;
             }
 
             // Cap ship, means a high conflict zone
             if (HaveSeenCapShip) {
-                grade = "High";
+                grade = CombatZone.DifficultyHigh;
             } else {
                 int warzoneNpcs = new List<bool>() { HaveSeenCaptain, HaveSeenCorrespondent, HaveSeenSpecOps }
                                     .Where(x => x == true)
                                     .Count()
                                     ;
 
-                if (warzoneNpcs >= 2 && grade != "High") {
+                if (warzoneNpcs >= 2 && grade != CombatZone.DifficultyHigh) {
                     // Only large combat zones have two NPCs
-                    grade = "High";
-                } else if (warzoneNpcs >= 1 && grade == "Low") {
-                    grade = "Medium";
+                    grade = CombatZone.DifficultyHigh;
+                } else if (warzoneNpcs >= 1 && grade == CombatZone.DifficultyLow) {
+                    grade = CombatZone.DifficultyMedium;
                 }
             }
-            cztype = "Ship";
+            cztype = CombatZone.ShipCombatZone;
         } else {
             transactions.AddIncomplete(new CombatZone(), "Failed to discern combat zone type");
             return;
diff --git a/EliteBGS/MainWindow.xaml b/EliteBGS/MainWindow.xaml
index afb480e..c34fd8f 100644
--- a/EliteBGS/MainWindow.xaml
+++ b/EliteBGS/MainWindow.xaml
@@ -108,7 +108,7 @@
                                                 <Separator Margin="2,0,2,0" VerticalAlignment="Top"/>
                                                 <Button Content="High" x:Name="High" Click="High_Click"/>
                                                 <Separator Margin="2,0,2,0" VerticalAlignment="Top"/>
-                                                <Button Content="On Foot" x:Name="OnFoot" Click="OnFoot_Click"/>
+                                                <Button Content="Ground" x:Name="Ground" Click="Ground_Click"/>
                                                 <Separator Margin="2,0,2,0" VerticalAlignment="Top"/>
                                                 <Button Content="Ship" x:Name="Ship" Click="Ship_Click"/>
                                             </StackPanel>
diff --git a/EliteBGS/MainWindow.xaml.cs b/EliteBGS/MainWindow.xaml.cs
index 3f55190..078e83f 100644
--- a/EliteBGS/MainWindow.xaml.cs
+++ b/EliteBGS/MainWindow.xaml.cs
@@ -285,7 +285,7 @@ public partial class MainWindow : Window {
             return;
         }
 
-        transaction.Grade = "Low";
+        transaction.Grade = CombatZone.DifficultyLow;
         RefreshView();
     }
 
@@ -295,7 +295,7 @@ public partial class MainWindow : Window {
             return;
         }
 
-        transaction.Grade = "Medium";
+        transaction.Grade = CombatZone.DifficultyMedium;
         RefreshView();
     }
 
@@ -305,17 +305,17 @@ public partial class MainWindow : Window {
             return;
         }
 
-        transaction.Grade = "High";
+        transaction.Grade = CombatZone.DifficultyHigh;
         RefreshView();
     }
 
-    private void OnFoot_Click(object sender, RoutedEventArgs e) {
+    private void Ground_Click(object sender, RoutedEventArgs e) {
         CombatZone transaction = GetTransaction<CombatZone>(sender);
         if (transaction == null) {
             return;
         }
 
-        transaction.Type = "On Foot";
+        transaction.Type = CombatZone.GroundCombatZone;
         RefreshView();
     }
 
@@ -325,7 +325,7 @@ public partial class MainWindow : Window {
             return;
         }
 
-        transaction.Type = "Ship";
+        transaction.Type = CombatZone.ShipCombatZone;
         RefreshView();
     }