They did not created reasonable scheduling expectations
Migrants from China came in large numbers to participate in the gold rush.
Lead expeditions to make the area. Made transportation a lot easier by expanding railroads out west. Created roads for easier travel. Established courts and government buildings. Sent the armed forces to make sure everything was safe. The question is vague so I kind of have to give you a vague answer.
The Portuguese, the Dutch, the English is the chronological order of European countries that controls the African slave trade. Slaves were used in mining and plantations. Five times as many Africans arrived in the Americas than in Europeans, as the result of this slave trade.
Persian empire rules at Greek
