How did slavery help build the roman empire?

They helped by conquering enemies.

Two major developments by the Romans that helped to manage the empire were roads and the aqueducts.

When the emperors came into being the empire was helped by the first emperor, Augustus, stabilizing the army. This was done by having the soldiers swear their allegiance to the emperor, not to their...

Julius Caesar was a Roman general and statesman. He played a critical role in the gradual transformation of the Roman Republicinto the Roman Empire.So yes he did help. ;)

Vatican CityOmg, Vatican city was born only at the end of the 1800 when the Italians break into Porta Pia and confined the Pope in an area that nowaddays it is called Vatican city. The colosseum was...