Catch-22 movie plot

Yossarian, a U.S. Air Force bomber in World War II, is angry because countless people who don't know him want to kill him, but it's not the enemy that bothers him, but his own people. His army's ever-increasing workload made him miserable. If Yossarian attempts to evade the mission, he will violate "Catch-22." This is a ridiculous military rule, which states that when facing danger in a mission, it is a manifestation of rationality to consider one's own safety; if a person willingly continues to perform a dangerous combat mission, then he is considered insane; But if he asks to be removed, it is considered evidence of sanity, so he is ineligible for removal   .