What country controlled most of the land in america by the mid-1500's

According to the qianlong emperor, why was china not interested in importing anything else?

The fourteenth amendment how did the action resolve a longstanding conflict in post-civil war america? it defined the process for readmittance of the former confederate states into the united states of america. it ensured the right to vote to all male citizens of the united states, regardless of race, color, or prior servitude. it defined citizenship and related rights for african americans. it abolished slavery in the united states.

What change took place in the african slave trade in the 1500's?