The Roman model of conquest was different. Rome expanded its territory in part because they extended many of the rights of citizenship to the people they conquered.
The Romans did not collect tribute from the people they conquered, but the Romans did require their neighbors to provide soldiers for the Roman army. As a result, the Romans had a massive source of manpower to draw upon for their many wars.
The Roman army built roads that often made the conquered cities more prosperous. The soldiers spread Roman customs to their home villages once their service ended. In time, the Latin language of the area around Rome was spoken throughout the Italian peninsula.