Most people is South Asia are Caucasian. Who aren't always "white" like the northern Europeans. Bangladesh is close to where Oriental people live e.g., Myanmar, so, there may be mixed people living there, but, most are Caucasian.
Just brown ones.
You will have to consult your grandparents about this.
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.