Tactical Air Command
Loosely, the Tactical Air Command (TAC) was the predecessor to the U.S. Air Combat Command. It strictly focused on tactical combat aircraft and aircraft that directly supported them. Since air refueling was not considered part of tactical functions, tankers then belonged to Strategic Air Command.
TAC, in its later years, was considered an exemplar for large organizational management, particularly under two commanders, GEN William Creech, and GEN John Loh. The latter made the transition to Air Combat Command.