The Empire & Commonwealth France the USA Russia & all nations which fought against Germany Italy & Japan Great Britain hadn't been a nation in its own right since 1800. The allies of the United Kingdom were the Commonwealth nations, Poland, France, Czechoslovakia, Norway, Denmark, Belgium, Luxembourg, the Netherlands, Greece, Yugoslavia and the USSR. The USA and others intervened later in the war.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.