No. 12 Squadron Royal Flying Corps (RFC) was formed in February 1915 from a flight of No. 1 Squadron RFC based at Netheravon Airfield in Wiltshire. The squadron moved to France in September 1915 and operated a variety of aircraft on operations over the Western Front during the First World War. In March 1918, the squadron was re-equipped with the Bristol F.2b Fighter just before becoming part of the newly formed Royal Air Force. The squadron, by then based at Bickendorf in Germany, was disbanded in 1922.