One of the big ones was army composition...Romans were all about the land troops and formations and britian was all about their ships and owning the waters.
The British Empire was the largest Empire in the world; the Roman Empire was somewhat smaller. The British dominated during their time through control of the oceans with battleships, while the Romans typically controlled the land with their legions. The British were a global Empire, spanning from Britain to India and Australia, while the Romans were all concentrated in one are around the Mediterranean.
Can't think of more right now, but there's a lot of differences.
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.