Number 111 (Fighter) Squadron, also known as No. CXI (F) Squadron and nicknamed "Treble One", was a squadron of the Royal Air Force. It was formed in 1917 in the Middle East as No. 111 Squadron of the Royal Flying Corps during the reorganisation of the Egyptian Expeditionary Force after General Edmund Allenby took command during the Sinai and Palestine Campaign. The squadron remained in the Middle East after the end of the First World War until 1920 when it was renumbered as No. 14 Squadron.