The late 1970s through 1992 were a transition era for most TAC fighter wings, replacing their third generation Vietnam-Era fighter and attack aircraft such as the McDonnell Douglas F-4 Phantom II, General Dynamics F-111, and LTV A-7 Corsair II with fourth generation fighter aircraft like the McDonnell Douglas F-15 Eagle, General Dynamics F-16 Fighting Falcon and Fairchild Republic A-10 Thunderbolt II). The F-15A/B and subsequent F-15C/D were designed for the air superiority role, which was not really filled since the North American F-86 Sabre entered the USAF inventory in the 1950s. Conversely, the F-16 was designed for a multi-mission fighter-bomber role, replacing the F-4D/Es, while the A-10 was designed to fill the close air support mission of the A-7D.