Almost unprepared, Britain entered the war with an Air Force of mostly outdated Biplanes and the embryo Fighter programme which produced the Spitfire, Hurricane and many, now familiar, names. The huge pace of development was to give us the Jet Engine by the end of the conflict. The USA waited to see what was going on in Europe and embarked on a vast development programme which produced some very advanced fighters and the famous long range daylight Bombers. Eventually this lead to the B29 and Atom Bomb.
There are 78 products in the WW2 Allies category.