<span>The columbian exchange was based on interactions between the old world and the "New World," since it involved the exchange of goods, ideas, etc between places like the Americas and Europe. </span>
Sharecropping, agricultural depression, the widespread infestation of the boll weevil, and flooding also provided motives for African Americans to move into the Northern Cities. The lack of social opportunities from Jim Crow laws also motivated African Americans to migrate Northward.
They were brought on a dutch ship that had captured them from the spanish.