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31 Squadron, formed in 1915, was the first operational military unit in Indian skies. During the [[First World War]] it was operational in the North West Frontier region of India . During the [[Second World War]] it saw action in Iraq and Burma. For details see ''The History of No. 31 Squadron Royal Flying Corps and Royal Air Force in the East from its formation in 1915 to 1950''.<ref> Naval and Military Press publication [http://www.naval-military-press.com/history-of-no.31-squadron-royal-flying-corps-and-royal-air-force-in-the-east-from-its-formation-in-1915-to-1950..html ''History Of of No.31 Squadron Royal Flying Corps And and Royal Air Force in the East from its formation in 1915 to 1950'']</ref>A later history is ''First in the Indian Skies'' by Norman Franks, 1981.<ref>Lindsay, Kimberley John. [https://www.greatwarforum.org/topic/265261-nw-frontier-photo-of-2lt-d-thomson-raf-31-sqn-obs/?do=findComment&comment=2689724 NW Frontier photo of 2Lt D. Thomson, RAF, 31 Sqn Obs] ''Great War Forum'' 6 October 2018. Also contains an image of a Gooli Chit. Retrieved 7 October 2018</ref> (British Library UIN: BLL01011032123)