> Over the course of the war the countries involved in the fighting produced more than 200,000 aircraft and even more engines. French industry alone accounted for a third of these.
At the end of the war, the Allied nations were out-producing the Germans by nearly five-to-one in terms of aircraft and over seven-to-one in engines. The UK was producing 31 times more aircraft per month than it had owned at the beginning of the conflict and the RAF was not only the first independent air service, but also the largest.