FC: Airplanes of WWII
1: In World War Two, airplanes of all types - fighters, bombers, transports, etc. - developed rapidly. hBiplanes saw action in the early years; jet aircraft zoomed through the skies over Germany in 1945. The Americans produced the "mostest of the bestest," that is, the largest numbers of generally superior warplanes.
2: All the combatant nations, USA, Germany, Japan, Britain, struggled to keep their aircraft up-to-date, almost constantly modifying them and introducing new variants. The Spitfire went through over twenty variants.
4: A fighter aircraft is a military aircraft designed primarily for air-to-air combat with the other aircraft. That is their main difference from bombers. It’s well known that fighters are small, fast, and maneuverable. In the aviation community, jet fighters are classified by generations. Actually there are no official definitions of these generations, and they rather represent the different stages in the development of fighter design approaches, performance capabilities, and technological evolution.