In 1820, amid growing sectional tensions over the issue of slavery, the U.S. Congress passed a law that admitted Missouri to the Union as a slave state and Maine as a free state, while banning slavery from the remaining Louisiana Purchase lands located north of the 36º 30' parallel.
The revolution in Haiti took place when a large portion of the islands slave population rose against their colonial masters. Many Americans were concerned that the revolt would inspire slaves in the US to do the same thing.
Genghis Khan forged the initial Mongol Empire in Central Asia, starting with the unification of the Mongol and Turkic confederations such as Merkits, Tartars, and Mongols
Ancient Ghana had numerous qualities of an advanced civilization. It had riches from exchange, enough nourishment, an taxation framework, an justice framework, a solid armed force, and it had a foreign policy. Most of them many civilization gained very late in time.