Topics about the Roman Empire?

Roman expansion, how the empire sustained itself through conquest, Rome was almost bankrupt for a while, then they conquered Dacia, which is today the country of Romania, and the wealth from the land that they got from this revived the empire at the time.

Caesar's well documented and brute conquest of the Gauls is another example, both characterize rome's use of war and peace for its own agenda.

Roman technology,how it was ahead of its time and helped them in battle, advanced catapults where used in some battles, they also had devices to measure the land and could calculate how long it would take for an army to maneuver from place to place.

Roman social structure, who was a slave, who was elite, who was the common man, who was a barbarian, ethnic diversity and conflicts within the empire.actually I myself only know a little about some of these topics.

Roman Republic.

Sure: the Roman Army,

Roman literature (in translation Catullus is quite sexy and amusing)

The status of women.