Lineage. Established as 1 Civil Engineering Group (Heavy Repair), and activated, on 8 May 1967. Organized on 15 May 1967. Redesignated 1 Civil Engineering Group, Heavy Repair, on 15 Oct 1969. Inactivated on 1 Nov 1971. Redesignated 1 Expeditionary RED HORSE Group, converted to provisional status, and assigned to the Air Combat Command to