Prior to the 20th century, the largest intercontinental migration of people in history was Atlantic slave trade. It <span>was the biggest deportation in history and a determining factor in the world economy of the 18th century. Millions of Africans were torn from their homes, deported to the American continent and sold as </span>slaves<span>. </span>
3250 BCE it started in ancient Egypt or so
Answer:Land during the non-growing season was not available for grazing milk cows and horses used for transportation. They helped a big deal in transportation.
Explanation:
Answer:
I believe it's two, gunpowder and crossbow
Explanation:
The soonest realized crossbows were designed in the main thousand years BC, not later than the seventh century BC in old China, not later than the fourth century BC in Greece (as the gastraphetes).
Gunpowder was developed in China at some point during the main thousand years AD. The most punctual conceivable reference to gunpowder showed up in 142 AD during the Eastern Han administration when the chemist Wei Boyang, otherwise called the "father of speculative chemistry", expounded on a substance with black powder like properties.
