JOE CROWLEY:'Where the Royal Flying Corps began with so little, 'by the end of the First World War, the RAF was the most powerful 'air force in the world. 'With more than 20,000 aircraft and ...

Above the blood and mud of the Western Front, the first World War saw the debut of a new form of warfare. The Royal Flying Corps, which became the Royal Air Force in 1918, played an increasingly ...