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.
The North Vietnamese strategy (before the U.S. pulled troops): guerrilla warfare and traps
The North Vietnamese strategy (after the U.S. pulls troops): organized warfare with tanks, infantry
Answer: A woman whom is accountable for her race