Why did united state get involved when north korea invaded south korea

Why did roosevelt support a “europe first” strategy even though it had been japan that had first attacked the united states?

Which economic system has become associated with authoritarian governments and total control of the economy? a. capitalism b. mercantilism c. communism d. socialism e. barter

Which of these factors could have influenced the sacco and vanzetti case? check all that apply a. prejudice or distrust toward immigrants b. fear or anarchist violence c. distrust of those who did not seem to fully support the government