Walking. Prehistoric humans came over on a land bridge between Russia and Alaska and worked their way down into south America.
About 5,000 Slaves served in the continental army, and by 1778 many states slaves who served in the American Revolution were granted their freedom.
The Turks and Ottomon empire made the Byzantine Empire fall, surrounding the city.
Answer:
D
Explanation: The arms race along with the space race completely bankrupted the soviet union, which was a major factor in it's collapse.
