In the early summer of 1917 the twin-gun Camel fighter was introduced. This aircraft was highly manoeuvrable and well-armed, and over 5,000 were produced up until the end of the War. It destroyed more enemy aircraft than any other British type, but its difficult flying qualities also killed very many novice pilots in accidents. It was used, modified, as both a night-fighter and shipboard aircraft, and was flown in combat by the Belgian and American Air Services as well as the British.