Groupe de Chasse I/3 was a fighter squadron of the French Air Force during World War II. At the outbreak of World War II, GC I/3 was equipped with the Morane-Saulnier MS.406. After seeing combat during the Phoney War, GC I/3 relocated to southern France. While at Cannes-Mandelieu, the unit converted to the new Dewoitine D.520 fighter. When the Battle of France began in May 1940, it was the only unit to be operationally ready with the D.520, which it first took to battle on May 12 after hastily relocating to Wez-Thuisy. In late June 1940, as the collapse of the French armies was inevitable, GC I/3 crossed the Mediterranean to escape capture. Here it went under control of the Vichy government. After three of its pilots, including ace Marcel Albert, had defected to Gibraltar to join the Free