What does President McKinley describe as the immediate causes bringing the United States into war

Who was the american banker who was aggressive in promoting growth?

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

What were some of the most important native items adopted by europeans ? what impact did they have on european life ?