The DH.4 was a two-seat combat aircraft, intended to perform both aerial reconnaissance and day bomber missions. By the end of production, a total of 1,449 aircraft (from orders for 1,700 aircraft) were constructed in Britain for the Royal Flying Corps (RFC) and the Royal Naval Air Service (RNAS). Production of the DH.4 was performed by a variety of companies beyond Airco themselves; these included F.W. Berwick and Co, Glendower Aircraft Company, Palladium Autocars, Vulcan Motor and Engineering, and the Westland Aircraft Work. Overseas, SABCA of Belgium produced a further 15 DH.4s during 1926. In the United States, several different manufacturers, including the Boeing Airplane Corporation, Dayton-Wright Airplane Company, the Fisher Body Corporation, and the Standard Aircraft Corporation produced an Americanised variant of the DH.4, featuring over 1,000 modifications from the original British design, to equip the American air services.