Slave Trade
By Eric
That is the Slave trade above the countries that were the reason of this are the Portuguese, the British, the French, the Spanish, the dutch, and the Americans.
Where did they take the Slaves?
In the 1600s Slaves were taken to America to work for people there. At the time all the countries from before (Above this) had control of some parts of the new world so they departure Slaves to those areas to make money off of them.