Answer: 10 million Africans had been sold by the 1800s, about into slavery in the Americas.
The Civil War was from 1861-1865 which is 4 years.
Tea was not only used as a beverage but also for medicinal purposes, paper and printing allowed for record keeping and communication, gunpowder was used as a propellant in firearms and explosives during warfare, and the compass allowed people to navigate on journeys.