States Air National Guard With the end of the Vietnam War, Air National Guard (ANG) units began receiving active-duty A-7D aircraft in 1974, beginning with the Colorado, New Mexico and Ohio ANG. South Carolina and Puerto Rico received aircraft in 1975. New production aircraft (1974, 1975 serial numbers) began to be received by ANG units in 1975. As Fairchild Republic A-10 Thunderbolt II aircraft were received by Tactical Air Command, additional A-7Ds were transferred to Iowa and South Dakota in 1977, along with Arizona and Michigan in 1978. The last Air National Guard squadrons equipped were units of the Pennsylvania ANG in 1980; and of the Oklahoma and Virginia ANGs in 1981. The A-7K Corsair II was a two-seat trainer version of the A-7D for Air National Guard, The aircraft was a fully combat capable A-7D but with two seats in tandem. The first A-7Ks were delivered in 1982. In the early 1990s, the A-7D was phased out of the ANG inventory, with the aircraft being sent to AMARC. In 1993 the last units to retire the A-7D were the ANG units at Rickenbacker ANGB (Ohio) in January, Des Moines (Iowa) in September, with the last unit being the 125th Tactical Fighter Squadron, Tulsa (Oklahoma) in October 1993. 112th Tactical Fighter Group Pennsylvania ANG (PT) 146th Tactical Fighter Squadron, Pittsburgh IAP Air Reserve Station, Pittsburgh Received A-7D in 1980 and A-7K in 1983.Re-designated as 146th Air Refueling Squadron with KC-135s on October 16, 1991. 114th Tactical Fighter Group South Dakota ANG (SD) 175th Tactical Fighter Squadron, Joe Foss Field Air National Guard Station, Sioux Falls Received A-7D in 1977 and A-7K in 1982.Converted to Block 30 F-16C/Ds on March 16, 1992. 121st Tactical Fighter Wing Ohio ANG (OH) 162d Tactical Fighter Squadron, Springfield Received A-7D in 1978 and A-7K in 1982.Converted to Block 30 F-16C/Ds in May 1993. 112th Tactical Fighter Squadron, Toledo Air National Guard Base, Toledo Received A-7D in 1979 and A-7K in 1980.Converted to Block 25 F-16C/Ds in April 1992. 166th Tactical Fighter Squadron, Rickenbacker Air National Guard Base, Columbus Received A-7D in 1974 and A-7K in 1983. Re-designated as 166th Air Refueling Squadron and equipped with KC-135Rs on January 16, 1993. 127th Tactical Fighter Wing Michigan ANG (MI) 107th Tactical Fighter Squadron, Selfridge Air National Guard Base, Detroit Received A-7D in 1978 and A-7K in 1983.Converted to Block 10 F-16A/B on April 1, 1990. 132d Tactical