Richard Nigel Cullen, DFC (5 June 1917 – 4 March 1941) was an Australian fighter ace of World War II. Serving with the Royal Air Force (RAF), he was credited with as many as sixteen aerial victories before being killed in action during the Battle of Greece. Born in Newcastle, New South Wales, Cullen was living in London and had already seen action in the Spanish Civil War when he joined the RAF in 1937. Following the outbreak of World War II, he served initially as a transport pilot with No.