Command airlift operations. The group was one of four C-119 groups assigned to the 349th Troop Carrier Wing in 1963, the others were the 938th Troop Carrier Group at Hamilton Air Force Base, California; 939th Troop Carrier Group, at Portland International Airport, Oregon, and the 941st Troop Carrier Group at Paine Air Force Base, Washington. The 940th performed routine Air Force Reserve airlift operations and was upgraded to the Douglas C-124 Globemaster II intercontinental airlifter in 1965. With the C-124, the group flew overseas missions, particularly to the Far East and Southeast Asia. Air Refueling In 1972, the group converted to Lockheed C-130A Hercules. In 1975, the group changed aircraft again, converting to the Boeing KC-135A Stratotanker, and moving 9.5 miles southeast to nearby Mather Air Force Base, California as a tenant AFRES unit operationally-gained by the Strategic Air Command. At Mather, the 920th joined a SAC tenant unit, the 320th Bombardment Wing, and Mather's host wing, the Air Training Command's 323d Flying Training Wing. It was at this time the group became the 940th Air Refueling Group. In September 1986, the 940th traded its older KC-135A Stratotankers for the upgraded KC-135E configuration. Following the inactivation of the Strategic Air Command in 1992, operationally claimancy for the 940th shifted to the newly established Air Mobility Command. When Mather AFB closed in 1993 pursuant to the 1989 Base Realignment and Closure Commission, the 940th returned to its former home of nearby McClellan. On 1 October 1994, as part of an Air Force directed restructuring of Air Force Reserve and Air National Guard flying units, the 940th was redesignated as the 940th Air Refueling Wing. The 940th remained at McClellan from July 1993 until May 1998, when that installation was also closed pursuant to 1993 Base Realignment and Closure Commission action. The wing then moved to its current home at Beale Air Force Base, California. In the summer of 2005 the 940th again upgraded its KC-135s from the KC-135E to the KC-135R model. However, shortly following this transition and the approval of the 2005 Base Realignment and Closure Commission recommendations by President Bush, the 940th changed missions from flying the KC-135 to an "associate" unit to the 9th Reconnaissance Wing at Beale, supporting the Northrop Grumman RQ-4 Global Hawk unmanned high-altitude reconnaissance aircraft, as well as assuming other command and control missions. On 12 March 2005, the 13th Reconnaissance Squadron was activated