Compare and contrast the historical Caesar's conquering of Gaul and crossing of the Rubicon with the conquest of the american southwest and battle for Hoover Dam in Fallout: New Vegas. Specifically the interaction betwixt Caesar and the vanquished peoples.

it is a compare and contrast

Something to do with gladiators? You could compare and contrast depictions of gladiators in modern media (such as Russell Crowe's Gladiator or the video game Ryse of Rome) with historical descriptions from Roman historians.

Or you could compare and contrast a figure in history, such as Spartacus, which was written about by ancient Roman historians as well as made into major movie and TV shows.

I, Claudius

Ben-Hur