Reminds me of a funny story that my father, who did three tours in Viet Nam with the Marines, told me. He said he was in a hole with a new corpsman during a very heavy mortar barrage. After the barrage my father spent some time getting to know the new guy. The new corpsman said he was getting drafted when his dad told him to go enlist in the Navy, that would keep him out of the field. So he enlisted in the Navy and they made him a corpsman and put him with the Marines.