The reason the Army, Navy, Air Force, and Marines squabble among themselves is that they don't speak the same language. For example, take a simple phrase like, Secure the building. â¢ The Army will put guards around the place. â¢ The Navy will turn out the lights and lock the doors. â¢ The Air Force will take out a 5-year lease with an option to buy. â¢ The Marines will kill everybody inside and make it a command post.