To add to the above, Constantine was a supporter of Christianity, though he didn't convert until he was on his deathbed. (Waiting till then was actually a common practice.) There was only one non-Christian emperor after him, called Julian the Apostate. (Apostate meaning non-Christian.)...one of the last strong Western emperors.
He ruled for only two years (around 360), but made quite a mark; mounting an ambitious invasion against Rome's greatest enemy at the time, Persia. He returned from the war, dying from wounds incurred there. There's controversy over whether he was killed by a Persian (since no soldier came up to ask for the bounty), or a Roman; since he renewed persecution of the Christians.
Since he thought that the empire was declining because of Christianity, and was the last person who tried to change this, he quite stands out. More.
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.