Which of these events occurred first?
a. the fall of the songhai empire
b. the fall of the mali empire
c. the introduction of islam into west africa
d. the entrance of portuguese explorers into african territory..

on this day in 1833, president andrew jackson announces that the government will no longer use the second bank of the united states, the country's national bank. a national bank had first been created by george washington and alexander hamilton in 1791 to serve as a central repository for federal fund