What happened after burgoyne surrendered

Between the world wars eisenhower's presidency the 1960s what is the organizing principle of this list?

Legacy of the new deal is positive or negative

Which of the following led to a continuation of the treatment in the excerpt above? a)the brutality of the trans-atlantic african slave trade. b)spanish repression after violent native uprisings in new spain during the 16th century. c)european competition to quickly establish colonial holdings in the new world. d)the reliance of the spanish on native americans to provide labor under the encomienda system.