How did the united states involvement in forge in wars at the turn of the 20th century change its role in world affairs

The U.S. planned on being neutral in world affairs and especially wars, but intervening in World War 1 especially changed that making the U.S. very active in world affairs especially when defending capitalism and preventing the spread of communism.

the answer would be a i think?

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.