Have an Answer?
Honestly get a degree in something you enjoy and could do later on in life. The military will give you the education you need for your job. Now if you still want to get a degree that is more military focused, it just depends on what you will be doing. If you go into an intelligence function you could do politics or world affairs maybe even engineering. If you go into finance you should go into accounting. History would also be helpful. The list goes on...
It actually depends on what you want to do in the military and what you can see yourself doing after the military.