Allies: Britain, Canada, Commonwealth, China, Russia 1941, USA 1941 Axis: Germany, Japan, Bulgaria, Hungary, Romania. Italy was Axis but joined the Allies in 1944 Finland was neither but fought against Russia.
There were many small nations on each side, especially the allies but here are the main ones Allies: UK, America(1941-), Russia, India, Australia, New Zealand, Canada, France, Holland, Burma Axis: Germany, Austria, Japan, Finland, Italy.
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.