I mean you could do all of this, but just have a Defence force. I like to have branches when I play Solo (or online) Like, Home Defence, The Army, The Marines, The Navy, and The Air Force. Then I like to have a Special Branch which include Commandos. So, Just deploy militia and use them as they should be so you don't have to worry about a back stabber. Militia + Armored Cars = Lit Defence Force.
"The first time you blow someone away is not an insignificant event. That said, there are some ******** in the world that just need to be shot." - General Mattis (USMC)