Puerto Rico is part of the United States (although it is having severe economic troubles right now). The USA took half of Mexico as a prize in the war. They took the Philippines too, but gave them independence after WWII.
They also wanted to annex Cuba at one time. They wanted the land and the room to raise cash crops. They didn't want the actual people.
Nobody thought much about that, unless they wanted to make them slaves or an underclass. This is the kind of thing that Malcolm X was talking about when he said America's "chickens were coming home to roost.
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.