Lineage. Established as 940 Logistics Group, and activated in the Reserve, on 1 Aug 1992. Redesignated as 940 Maintenance Group on 1 Oct 2002.Assignments. 940 Air Refueling Group (later, 940 Air Refueling Wing), 1 Aug 1992-1 Jul 2009. 940 Air Refueling Wing, 29 Apr 2016-.Stations. Mather AFB,