90th Operations Group The 90th Operations Group ( 90 OG ) is the operational component of the United States Air Force 90th Missile Wing . It is stationed at Francis E . Warren Air Force Base , Wyoming , and is assigned to the Air Force Global Strike Command ( AFGSC ) Twentieth Air Force . The group is responsible for maintaining and operating on alert the wing ' s assigned Minuteman III Intercontinental ballistic missile s , including training missile crew members . The unit ' s World War II predecessor unit , the 90th Bombardment Group , operated primarily in the Southwest Pacific Theater as an B - 24 Liberator heavy bomber unit assigned to Fifth Air Force . It was awarded two United States Distinguished Unit Citation s and the Philippine Presidential Unit Citation for its combat service in China ; Netherlands East Indies ; New Guinea ; the Bismarck Archipelago ; the Western Pacific ; Leyte , and Luzon . During the early years of the Cold War , the unit operated as a Strategic Air Command B - 29 Superfortress Operational Training Unit for aircrews being assigned to combat duties during the Korean War . Overview . The 90th OG has command and control of 15 Missile Alert Facilities and 150 LGM - 30G Minuteman - III intercontinental ballistic missiles ( ICBM ) in a area covering three states . More than 1 , 500 missileers , pilots , maintainers , chefs and facility managers work together to accomplish the mission to provide safe , secure ICBMs , ready to immediately put bombs on target . History . Established in early 1942 as a medium bomb group ; assigned to III Bomber Command for training . Primarily trained in the southeastern United States with B - 26 Marauder s , later B - 25 Mitchell s . Redesignated as a B - 24 Liberator heavy bomb group in August 1942 and reassigned to Willow Run Airport , Michigan for conversion training on newly - manufactured Ford Liberators . Assigned to VII Bomber Command with B - 24Ds , the unit was reassigned to the Honolulu modification center at Hickam Field , Hawaii in September where the aircraft were prepared for duty in the Pacific Theater of Operations ( PTO ) . During the next two months the group trained on long overwater navigation training and other necessities for operating in the Pacific . Arrived initially in Northern Queensland , Australia in November 1942 and began long - range strategic bombardment operations almost immediately on arrival . Attacked enemy airfields , troop concentrations , ground installations and shipping in New Guinea , the Bismarck Archipelago , Palau , and the southern Philippines . Received a Distinguished Unit Citation ( DUC ) for operations in Papua , July 1942 – January 1943 , participated in the Battle of Bismarck Sea in March 1943 , and earned another DUC for strikes through heavy flak and fighter opposition on enemy airfields at Wewak , New Guinea , in September 1943 . During 1944 , supported the New Guinea Campaign for first six months , then made long - range raids on oil refineries at Balikpapan , Borneo , in Sep and Oct . From January 1945 , supported ground forces on Luzon , attacked industries on Formosa , and bombed railways , airfields , and harbor facilities on the Asiatic mainland . After the war , flew reconnaissance missions over Japan and ferried Allied prisoners of war from Okinawa to Manila . Ceased operations by November 1945 . Unit was demobilized in the Philippines ; personnel returning to the United States via any available transport with B - 24s being sent to reclamation in the Philippines . Reactivated by Strategic Air Command in 1947 , however not equipped or manned until 1951 . During the early years of the Cold War , served as operational training unit for B - 29 Superfortress aircrews and mechanics of the 376th , 308th , and 310th Bombardment Wings , in turn , 1951 – 1952 ; as replacement training unit for B - 29 and RB - 29 aircrews for Far East Air Forces ( 1951 – 1952 ) prior to the crews being assigned to combat duties during the Korean War . Inactivated June 1952 when operational squadrons assigned directly to parent wing . Reactivated in September 1991 as the operational component of the 90th Missile Wing as part of the wing ' s conversion to the Objective Organization . Was assigned operational control of the 90th MW LGM - 30G Minuteman III and LGM - 118A Peacekeeper ICBM squadrons , responsible for maintaining and operating on alert the wing ' s assigned missiles , including training missile crew members . Began retiring Peacekeeper missiles in 2001 ; squadron inactivated in 2005 . Maintains Minuteman III squadrons on nuclear alert .