Task: Question Understanding
Input (English): Context : Biggles has an unusually lengthy career, flying a number of aircraft representative of the history of British military aviation, from Sopwith Camels during World War I, Hawker Hurricanes and Supermarine Spitfires in World War II, right up to the Hawker Hunter jet fighter in a postwar adventure Biggles in the Terai. 
Question : With which military branch did Biggles hold a command?
Output (English): military branch