三军用命

(of a team) to throw oneself into the battle

three / 3

(in former times) upper, middle and lower army / army of right, center and left / (in modern times) the three armed services: Army, Navy and Air Force

(bound form) army / military

(for) military use / military application

to use / to employ / to have to / to eat or drink / expense or outlay / usefulness / hence / therefore

to follow orders / to abide by / to obey

life / fate / order or command / to assign a name, title etc