activated at Selfridge Field, Michigan, where it was attached to the 1st Pursuit Group and equipped with various models of the Curtiss Hawk series of single engine biplane pursuit aircraft. By 1932, the squadron's primary aircraft became the Boeing P-12, although the squadron continued to fly the P-6 model of the Hawk. As part of its mission to develop pursuit tactics, the squadron continued to fly a variety of other aircraft, notably including the Berliner-Joyce P-16 and Consolidated P-30 two-seat fighters. Training of fighter pilots and testing of tactics continued after 1932 when the squadron moved to Langley Field, Virginia, where it was assigned to the 8th Pursuit Group. In 1934, following a Congressional investigation of how air mail contracts had been awarded by the United States Postal Service, President Franklin D. Roosevelt cancelled all existing air mail contracts and assigned the duty of flying the mail to the Air Corps. The squadron began flying its P-12s on air mail routes, but they proved unsuitable for the work, lacking instruments to fly at night or in adverse weather. Moreover, they could only carry about 50 lbs of mail, and with the mail load, the planes were tail heavy and difficult to fly. The P-12s were withdrawn from the project within a week, although the larger observation aircraft continued to fly mail until May, when new air mail contracts were awarded. The P-30, along with the arrival of Curtiss YP-37s in 1938 marked a significant change in the squadron's equipment, the transition from fabric-covered biplanes to all metal monoplanes. By 1939, the squadron was flying Curtiss P-36 Hawks, which were quickly replaced by the more powerful Curtiss P-40 Warhawks. As the Air Corps expanded in 1940, the squadron moved to Mitchel Field, New York, and was located there when the attack on Pearl Harbor occurred in December 1941. World War II During World War II, the squadron flew P-40 Warhawk, P-39 Airacobra, P-47 Thunderbolt, and P-38 Lightning fighters in a number of Pacific Theater campaigns. These included the defense of New Guinea and the battle for the Philippines. They moved to Fukuoka, Japan at the end of the war. Korean War When the communist forces attacked the Republic of Korea in June 1950, the 36th found itself in the fight from the beginning of the conflict. Flying F-80 Shooting Stars, the squadron attacked advancing North Korean tanks, trucks, artillery, and troops.