diff --git a/README.md b/README.md
index c184bdf..35db3f7 100644
--- a/README.md
+++ b/README.md
@@ -72,3 +72,4 @@ CC BY-NC-SA 3.0, with the following attribution: Copyright 2015-2016, Stephen J
 * track-4.mp3, by Alexandr Zhelanov - https://soundcloud.com/alexandr-zhelanov
 * DST-RailJet-LongSeamlessLoop.ogg, by Deceased Superior Technician - http://opengameart.org/content/railjet-long-seamless-loop
 * covert_operations.mp3, by artisticdude - http://opengameart.org/content/covert-operations
+* Tactical Pursuit.mp3, by Matthew Pablo - http://opengameart.org/content/tactical-pursuit
diff --git a/data/missions/clarke/01 - clarke defence #1.json b/data/missions/clarke/01 - clarke defence #1.json
index 7b35a11..4b98028 100644
--- a/data/missions/clarke/01 - clarke defence #1.json	
+++ b/data/missions/clarke/01 - clarke defence #1.json	
@@ -4,7 +4,7 @@
 	"requires" : 4,
 	"background" : "gfx/backgrounds/background06.jpg",
 	"planet" : "gfx/planets/bluePlanet.png",
-	"music" : "music/battle/heroism.ogg",
+	"music" : "music/battle/Tactical Pursuit.mp3",
 	"epic" : {
 		"fighterLimit" : 12
 	},
diff --git a/data/missions/clarke/06 - clarke defence #6.json b/data/missions/clarke/06 - clarke defence #6.json
index fa8e3ca..c40caf7 100644
--- a/data/missions/clarke/06 - clarke defence #6.json	
+++ b/data/missions/clarke/06 - clarke defence #6.json	
@@ -4,7 +4,7 @@
 	"requires" : 30,
 	"background" : "gfx/backgrounds/background06.jpg",
 	"planet" : "gfx/planets/bluePlanet.png",
-	"music" : "music/battle/DST-RailJet-LongSeamlessLoop.ogg",
+	"music" : "music/battle/Tactical Pursuit.mp3",
 	"unwinnable" : 1,
 	"objectives" : [
 		{
diff --git a/data/missions/coyote/02 - coyote assault #2.json b/data/missions/coyote/02 - coyote assault #2.json
index 9f09cf0..fa850e3 100644
--- a/data/missions/coyote/02 - coyote assault #2.json	
+++ b/data/missions/coyote/02 - coyote assault #2.json	
@@ -4,7 +4,7 @@
 	"requires" : 4,
 	"background" : "gfx/backgrounds/background03.jpg",
 	"planet" : "gfx/planets/mythos.png",
-	"music" : "music/battle/heroism.ogg",
+	"music" : "music/battle/Tactical Pursuit.mp3",
 	"epic" : {
 		"fighterLimit" : 12
 	},
diff --git a/data/missions/coyote/03 - coyote assault #3.json b/data/missions/coyote/03 - coyote assault #3.json
index 2026f38..fa8cd41 100644
--- a/data/missions/coyote/03 - coyote assault #3.json	
+++ b/data/missions/coyote/03 - coyote assault #3.json	
@@ -4,7 +4,7 @@
 	"requires" : 8,
 	"background" : "gfx/backgrounds/background03.jpg",
 	"planet" : "gfx/planets/mythos.png",
-	"music" : "music/battle/heroism.ogg",
+	"music" : "music/battle/Tactical Pursuit.mp3",
 	"epic" : {
 		"fighterLimit" : 12
 	},
diff --git a/data/missions/iliad/02 - iliad defence #2.json b/data/missions/iliad/02 - iliad defence #2.json
index d5f3098..2164ee6 100644
--- a/data/missions/iliad/02 - iliad defence #2.json	
+++ b/data/missions/iliad/02 - iliad defence #2.json	
@@ -4,7 +4,7 @@
 	"requires" : 18,
 	"background" : "gfx/backgrounds/background01.jpg",
 	"planet" : "gfx/planets/bluePlanet.png",
-	"music" : "music/battle/heroism.ogg",
+	"music" : "music/battle/Tactical Pursuit.mp3",
 	"epic" : {
 		"fighterLimit" : 12
 	},
diff --git a/data/missions/iliad/05 - iliad defence #5.json b/data/missions/iliad/05 - iliad defence #5.json
index 990f1eb..73f74f7 100644
--- a/data/missions/iliad/05 - iliad defence #5.json	
+++ b/data/missions/iliad/05 - iliad defence #5.json	
@@ -4,7 +4,7 @@
 	"requires" : 26,
 	"background" : "gfx/backgrounds/background01.jpg",
 	"planet" : "gfx/planets/bluePlanet.png",
-	"music" : "music/battle/DST-RailJet-LongSeamlessLoop.ogg",
+	"music" : "music/battle/Tactical Pursuit.mp3",
 	"epic" : {
 		"fighterLimit" : 12
 	},
diff --git a/music/battle/Tactical Pursuit.mp3 b/music/battle/Tactical Pursuit.mp3
new file mode 100644
index 0000000..94c227f
Binary files /dev/null and b/music/battle/Tactical Pursuit.mp3 differ