From Wikipedia: Air Combat Command:
Air Combat Command (ACC) is a major command (MAJCOM) of the United States Air Force. ACC is one of nine major commands (MAJCOMs), reporting to Headquarters, United States Air Force (HAF).
ACC is headquartered at Langley Air Force Base Virginia.
The mission of Air Combat Command is to be the primary force provider of combat airpower to America's warfighting commands. To support global implementation of national security strategy, ACC operates fighter, bomber, reconnaissance, battle-management and electronic-combat aircraft. Air Combat Command also provides command, control, computing, communications and intelligence (C4I) systems, and conducts global information operations.
As a force provider, ACC organizes, trains, equips and maintains combat-ready forces for rapid deployment and employment while ensuring strategic air defense forces are ready to meet the challenges of peacetime air sovereignty and wartime air defense.
ACC numbered air forces provide the air components to United States Central Command, United States Southern Command, United States Joint Forces Command, United States Northern Command and United States Strategic Command.
In addition, ACC augments forces to United States European Command and United States Pacific Command