Military courtesy is one of the defining features of a professional military force. These courtesies form a strict and sometimes elaborate code of conduct. Military courtesy is an extension and a formalization of courtesies practiced in a culture's everyday life. It is intended to reinforce discipline and the chain of command, defining how soldiers will treat their superiors and vice versa. They are also thought to enhance esprit de corps. Military courtesies may also be adopted by paramilitary organizations.