392d Strategic Missile Wing The 392d Strategic Missile Wing is an inactive United States Air Force unit . It was last assigned to the 1st Strategic Aerospace Division , stationed at Vandenberg Air Force Base , California . It was inactivated on 20 December 1961 . During World War II , its predecessor unit , the 392d Bombardment Group was an Eighth Air Force B - 24 Liberator heavy bombardment group stationed in England , stationed at RAF Wendling . The group flew 285 combat missions , suffering 1552 casualties including 835 killed in action or line of duty and 184 aircraft lost . History . World War II . Activated 26 January 1943 at Davis Monthan AAFd , Arizona , and trained there until February 1943 . The unit moved to Biggs Field , Texas , and on March 1943 , and then to Alamogordo AAB , New Mexico on 18 April 1943 . The ground unit left for the port of embarkation on 18 July 1943 . The unit sailed out from New York on 25 July 1943 , and arrived in England on 30 July 1943 . Assigned to the Eighth Air Force at RAF Wendling in East Anglia . The group was assigned to the 14th Combat Bombardment Wing , and the group tail code was a " Circle - D " . The 392d BG entered combat on 9 September 1943 and engaged primarily in bombardment of strategic objectives on the Continent until April 1945 . The group attacked such targets as an oil refinery at Gelsenkirchen , a marshalling yard at Osnabrück , a railroad viaduct at Bielefeld , steel plants at Brunswick , a tank factory at Kassel , and gas works at Berlin . The group took part in the intensive campaign of heavy bombers against the German aircraft industry during Big Week , 20 – 25 February 1944 , being awarded a Distinguished Unit Citation for bombing an aircraft and component parts factory at Gotha on 24 February . The unit sometimes supported ground forces or carried out interdictory operations along with bombing airfields and V - weapon sites in France prior to the Normandy invasion in June 1944 and struck coastal defenses and choke points on D - Day . The group hit enemy positions to assist ground forces at Saint - Lô during the breakthrough in July 1944 . Bombed railroads , bridges , and highways to cut off German supply lines during the Battle of the Bulge , December 1944 – January 1945 . Dropped supplies to Allied troops during the air attack on Holland in September 1944 and during the airborne assault across the Rhine in March 1945 . The 392d Bomb Group flew its last combat mission on 25 April 1945 , then carried food to the Dutch . The unit returned to Charleston AAF South Carolina on 25 June 1945 and was inactivated on 13 September 1945 . Redeployed to the US May / June 1945 . First of the aircraft departed the United Kingdom on 29 May 1945 . Ground echelon sailed on Queen Mary on 15 June 1945 , arriving in New York on 20 June 1945 . Personnel had 30 days R and R with the unit assembling in Charleston AAFd , South Carolina , in late June 1945 for air transport duties but was not fully manned and inactivated on 13 September 1945 . Cold War . Reactivated as a reserve corollary of the 47th Bombardment Wing , Light in 1949 . The wing was reformed in 1961 to control missile training operations at Vandenberg AFB , Lompoc , California . It operated the Atlas missile , with the 564th SMS ( 18 October 1961 – 20 December 1961 ) and the 565th SMS ( 1 July 1961 – 1 December 1964 ) and the Titan . However it was eliminated by a reorganization of 1st Strategic Aerospace Division .