Answer:
Timbuktu, the capital city, became a leading Islamic center for education, commerce, and the slave trade.
Explanation:
It appears there was a slave-trade route through the Sahara that brought sub-Saharan Africans to Rome, a global center of slavery.
Answer:
Resistance to lifetime servitude began with the first Africans forcibly brought to the Western Hemisphere in the 1500s, and resistance continued until the last emancipations in the Americas.