Built in large numbers in the years leading up to World War II (1939-1945), Bristol's Blenheim saw use as both a fighter and bomber thanks to its high speed in relation to the biplane types it was then replacing. Aside from its work as the staple medium RAF bomber from 1939 through to 1942, Belnheims also served as pioneer radar-equipped nightfighters in 194041 and long-range patrol aircraft with Coastal Command.