<span>There were quite a few African American slaves that worked on development west of the Trans Appalachian Mountain region. The Appalachian Mountains span a length of over 1000 miles, and many people wanted to try to settle west of them .</span>
Last one because everyone started building navies, so everyone else started building navies in order to defend against other navies.
I think aproximently about 1990
Answer:
We already know that civilization started at The Fertile Crescent, but mostly we dont know what areas had civilizations or not. Almost every area had no civilizations but then they started to evolve like hominids for example.
Explanation:
