Its mission is to provide citizen airmen in support of United States national security objectives worldwide.

[6] Although this was not a problem when the entire wing was called to active service, mobilizing a single flying squadron and elements to support it proved difficult.

To resolve this, at the start of 1962, Continental Air Command, (ConAC) determined to reorganize its AFRES wings by establishing groups with support elements for each of its troop carrier squadrons.

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.

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.

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.

Both units were assigned to the 610th Regional Support Group at NAS JRB Fort Worth, Texas until the wing concluded its tanker mission.

In 2013, the 655th Intelligence, Surveillance and Reconnaissance Group stood up at Wright-Patterson Air Force Base, Ohio.

[9] This article incorporates public domain material from the Air Force Historical Research Agency