Boi what truce i dont know what you are talking about
I think it is an article or an excerpt
The main way in which the US involvement in the spanish-american war represented a shift from isolationism to intervention is that this was the first time the United States had really committed troops and resources to a war that had seemingly no effect on the expansion of US borders. It was more done out of altruism.
Europeans were able to trade in a more efficient way. it made it easier for them to trade slaves and other items from Africa to American colonies to Europe