Marine Fighter Attack Training Squadron 501 (VMFAT-501) is a newly reactivated training squadron in the United States Marine Corps that will eventually consist of 20 F-35B Lightning II aircraft and will serve as the Fleet Replacement Squadron. Known as the "Warlords," the squadron will be based at Eglin Air Force Base, Florida and will fall administratively under Marine Aircraft Group 31 and the 2nd Marine Aircraft Wing, but operationally under the U.S. Air Force's 33d Fighter 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.