The General Dynamics/Grumman F-111B was developed as a long-range carrier-based interceptor follow-on to the F-4 Phantom II. It was developed in the 1960s by General Dynamics in conjunction with Grumman for the United States Navy (USN) as part of the joint Tactical Fighter Experimental (TFX) with the United States Air Force (USAF) to produce a common fighter across services for a variety of missions. The F-111B incorporated innovations such as variable-geometry wings, afterburning turbofan engines, and the long-range AWG-9/AIM-54 Phoenix weapons system.