Usually. Sometimes they enlist (or allow themselves to be drafted) because they think it will further their larger ambitions. Here's an interesting story of a

Usually. Sometimes they enlist (or allow themselves to be drafted) because they think it will further their larger ambitions. Here's an interesting story of a potential future US President who didn't survive WWII: https://en.wikipedia.org/wiki/Joseph_P._Kennedy,_Jr https://en.wikipedia.org/wiki/Joseph_P._Kennedy,_Jr. His younger brother took his place doing that whole presidency thing.