The 319th Missile Squadron is a United States Air Force unit assigned to the 90th Operations Group at Francis E. Warren Air Force Base, Wyoming. The squadron is equipped with the LGM-30G Minuteman III intercontinental ballistic missile, with a mission of nuclear deterrence. The squadron was activated again in 1963 as the 319th Strategic Missile Squadron, an LGM-30B Minuteman I squadron. In 1974 it modernized its missiles to the multi-warhead Minuteman III. Following the implementation of the Strategic Arms Reduction Treaty, its missiles were limited to a single warhead.