Noun | 1. | ![]() military operation, operation - activity by a military or naval force (as a maneuver or campaign); "it was a joint operation of the navy and air force" combat mission - a mission to capture or defend something search mission - a mission to discover something search and destroy mission - an operation developed for United States troops in Vietnam; troops would move through a designated area destroying troops as they found them direct support - a mission requiring one force to support another specific force and authorizing it to answer directly the supported force's request for assistance armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker" |