Approximately how many Africans were forced into the transatlantic slave trade between 1400 through 1800

12.5 million Africans were shipped to the New World. 10.7 million survived the dreaded Middle Passage, disembarking in North America, the Caribbean, and South America.

10.7 million Africans were shipped directly to North America? Only about 388,000.

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.