When did the spanish bring the first major shipment of horses to the americas

1)if a revolution merely replaces one authoritarian ruler with another, is it still a a revolution? a turning point? 2) “the great events of history have a way of defying ideological manipulation”, according to serge schmemann, a pulitzer prize winning journalist. do you agree, why or why not? other thoughts?

Which native american tribe allied with the spanish?

How did the iran-contra affair impact the conflict between the united states and the soviet union? what role did the iran-contra affair play in both iran and nicaragua?