Early in 1942, the United States Government leased 6,500 acres of mostly brush, palmetto trees, and in some places pine stumps left from previous logging operations to establish a flexible gunnery training school on this site. Construction of the training center began in February 1942, and by June, 1,200 men were working 10 hours a day to have the field ready for operations. The field was formally activated on July 5, 1942, and classes began on September 7, 1942, even though field construction was far from complete. At the peak of its operation, the field was home to 16,000 people and consisted of almost 100 buildings. Initially, bomber gunners went through a five-week training program in which they were trained to maintain, disassemble, and effectively fire .30 and .50 caliber machine guns used to defend bomber aircraft such as the B-17, B-24, and B-29 from enemy fighter planes. Trap and skeet shooting ranges were used to develop aiming skills, and students were also trained on the moving target range riding in Jeeps, in simulator training, and in the final week in air-to-air gunnery shooting at targets towed by aircraft. Various aircraft were used to perform the training mission at the field, including the AT-6, AT-18, RB-34, P-39, P-63, B-17, B-24, and B-29. The field was closed on September 30, 1945. Fifty thousand gunners had graduated from the program, and the field had also trained co-pilots for the B-17, B-24, and B-29 bombers. The field made a significant contribution to victory in World War II.