A flight is a military unit in an air force, naval air service, or army air corps. It is usually composed of three to six aircraft, with their aircrews and ground staff; or, in the case of a non-flying ground flight, no aircraft and a roughly equivalent number of support personnel. In most usages, multiple flights make up a squadron. The "flight" is also a basic unit for intercontinental ballistic missiles. The French equivalent is an "escadrille".