The 133rd Operations Group is the flying component of the Minnesota Air National Guard's 133d Airlift Wing, stationed at Minneapolis–Saint Paul Joint Air Reserve Station, Minnesota. If activated to federal service, the group is gained by Air Mobility Command of the United States Air Force. In May 1946, the group was allotted to the National Guard and renumbered as the 133d Fighter Group. It trained with North American P-51 Mustangs. In 1951 it was mobilized for the Korean War and served in an air defense role until inactivating in February 1952 in a reorganization of Air Defense Command.