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In 1942 Douglas was replaced at Fighter Command by Leigh-Mallory and was transferred to Egypt, becoming commander of the RAF in the Middle East in 1943.
Douglas returned to England in 1944 to head Coastal Command during the invasion of Normandy.
Douglas was well rewarded after the war, he was the first commander of the British Occupation Zone in Germany and he was made 1st Baron Douglas of Kirtleside in 1946 and promoted to Air Marshal of the RAF.