The 15th Test and Evaluation Squadron is a United States Air Force unit, stationed at Eglin Air Force Base, Florida and assigned to the 753rd Test and Evaluation Group. It was first activated in the expansion of the United States military forces prior to World War II as the 15th Pursuit Squadron. It moved to Panama in 1942, where it participated in the defense of the Panama Canal. It returned to the United States, where it was a Replacement Training Unit for fighter pilots until 1944, when it was disbanded as the 15th Fighter Squadron in a reorganization of Army Air Forces training units in 1944