The 370th Fighter Group was redesignated the 140th Fighter Group, and was allotted to the National Guard on 24 May 1946.
It was organized at Buckley Field, Colorado, and was extended federal recognition on 1 October 1946.
The unit was the first Air National Guard group receiving federal recognition.
 The 140th Fighter Group assigned to the 86th Fighter Wing.

The 140th Fighter Group consisted of the 120th Fighter Squadron at Buckley, the 187th Fighter Squadron at Cheyenne Municipal Airport, Wyoming and the 191st Fighter Squadron at Salt Lake City Municipal Airport.
Utah.
 Because it was organized earlier than other National Guard groups, it also temporarily controlled the 127th Fighter Squadron at Wichita Municipal Airport, Kansas and the 173d Fighter Squadron at Lincoln Municipal Airport.
Nebraska until the 132d and 137th Fighter Groups were organized in 1948.
  As part of the Continental Air Command Fourth Air Force, the unit trained for fighter-bomber missions and air-to-air combat.
 On 31 October 1950 the Air National Guard converted to the wing base organization and 86th Fighter Wing was inactivated, and 140th was assigned to the new 140th Fighter Wing, which assumed the personnel and mission of the 86th.
The 370th Fighter Group was redesignated the 140th Fighter Group, and was allotted to the National Guard on 24 May 1946. It was organized at Buckley Field, Colorado, and was extended federal recognition on 1 October 1946. The unit was the first Air National Guard group receiving federal recognition.  The 140th Fighter Group assigned to the 86th Fighter Wing.
The 140th Fighter Group consisted of the 120th Fighter Squadron at Buckley, the 187th Fighter Squadron at Cheyenne Municipal Airport, Wyoming and the 191st Fighter Squadron at Salt Lake City Municipal Airport. Utah.  Because it was organized earlier than other National Guard groups, it also temporarily controlled the 127th Fighter Squadron at Wichita Municipal Airport, Kansas and the 173d Fighter Squadron at Lincoln Municipal Airport. Nebraska until the 132d and 137th Fighter Groups were organized in 1948.   As part of the Continental Air Command Fourth Air Force, the unit trained for fighter-bomber missions and air-to-air combat.  On 31 October 1950 the Air National Guard converted to the wing base organization and 86th Fighter Wing was inactivated, and 140th was assigned to the new 140th Fighter Wing, which assumed the personnel and mission of the 86th.
140th Operations Group