before the planes were even unpacked. The first operational flights did not occur until 27 May 1915, when the Mesopotamian Half Flight was called upon to assist the Indian Army in providing air support during the Mesopotamian Campaign against the Ottoman Empire, in what is now Iraq. The corps later saw action in Egypt, Palestine and on the Western Front throughout the remainder of the First World War. By the end of the war, four squadrons—Nos. 1, 2, 3 and 4—had seen operational service, while another four training squadrons—Nos. 5, 6, 7 and 8—had also been established. A total of 460 officers and 2,234 other ranks served in the AFC, whilst another 200 men served as aircrew in the British flying services. Casualties included 175 dead, 111 wounded, 6 gassed and 40 captured. Inter-war period The Australian Flying Corps remained part of the Australian Army until 1919, when it was disbanded along with the First Australian Imperial Force (AIF). Although the Central Flying School continued to operate at Point Cook, military flying virtually ceased until 1920, when the interim Australian Air Corps (AAC), with a wing each for the Army and the Navy, was formed as a unit of the Army. The AAC was succeeded by the Australian Air Force which was formed on 31 March 1921. King George V approved the prefix "Royal" in May 1921 and became effective on 13 August 1921. The RAAF then became the second Royal air arm to be formed in the British Commonwealth, following the British Royal Air Force. When formed the RAAF had more aircraft than personnel, with 21 officers and 128 other ranks and 153 aircraft. As British aircraft manufacturers at the time were unable to meet Australian requirements, in addition to British production demands, the Australian government established the Commonwealth Aircraft Corporation in 1936 and purchased some American aircraft. Second World War Europe and the Mediterranean In September 1939, the Australian Air Board directly controlled the Air Force via RAAF Station Laverton, RAAF Station Richmond, RAAF Station Pearce, No. 1 Flying Training School RAAF at Point Cook, RAAF Station Rathmines and five smaller units. In 1939, just after the outbreak of the Second World War, Australia joined the Empire Air Training Scheme, under which flight crews received basic training in Australia before travelling to Canada for advanced training. A total of 17 RAAF bomber, fighter, reconnaissance and other squadrons served