Marine Fighter Attack Training Squadron 501 (VMFAT-501) is a training squadron in the United States Marine Corps, consisting of 20 F-35B Lightning II aircraft and serves as the Fleet Replacement Squadron. Known as the "Warlords," the squadron is based at Marine Corps Air Station Beaufort, South Carolina and falls administratively under Marine Aircraft Group 31 and the 2nd Marine Aircraft Wing. The squadron has assumed the lineage of VMFA-451 which was originally known as the “Blue Devils” and saw action during World War II and Operation Desert Storm. They were decommissioned on January 31, 1997.