In the early stages of the Second World War, the German military demonstrated its role as a pioneer in the deployment of airborne operations. These forces had conducted several successful operations during the Battle of France in 1940, including the use of glider-borne troops during the Battle of Fort Eben-Emael. Having been impressed by the performance and capabilities of German airborne operations, the Allied governments decided that they would also form their own airborne formation. As a result of this decision, the creation of two British airborne divisions came about, as well as a number of smaller-scale units. On 22 June 1940, the British airborne establishment was formally initiated when the Prime Minister, Winston Churchill, directed the War Office in a memorandum to investigate the possibility of creating a corps of 5,000 parachute troops. During 1941, the United States also embarked on a similar programme.