This question is a little confusing, and reminds me of a college student who wrote in a paper once, "The Roman Empire went downhill after Charlemagne. " Of course, he was confused--Charlemagne was the Holy Roman Emperor, not the Roman Emperor. Two different things.
The Roman Republic started about 500 BCE (or B.C. , if you count that way) and ended with the assassination of Julius Caesar in 44 BCE. The Middle Ages was a period in European history from about 500 CE (or A.D.) until 1500 CE. They had a system called the Holy Roman Empire, which may add to the confusion.
Of course, the Romans didn't know they were living in the BCE (or B. C) period. They counted their years AUC--ab urbe condita, or from the foundation of Rome.
Which they, of course, thought was a really important city.
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.