How did conquest and expansion change roman trade?

"The expansion of Roman power throughout the Mediterranean affected many aspects of political life. Conquests meant enslavement of many conquered people, this expanding the role of slavery in Roman economy and contributing to the growth of large estates and possibly to economic inequality as well."

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.