I can't speak for any branch of service except the Marine Corps, but I suspect all branches are the same in that respect.
The goal is always the same - killing the enemy - whether it's by changing a track on an M1 Abrams or treating a shrapnel wound on a squad leader's arm.
If he has earned his globe and anchor, his duty, FIRST, is to kill the enemy by whatever means given to him.
"May God have mercy upon my enemies, because I won't.""No bastard ever won a war by dying for his country. He won it by making the other poor dumb bastard die for his country."