Answer:
The Mongol invasion of Central Asia occurred after the unification of the Mongol and Turkic tribes on the Mongolian plateau in 1206. It was finally complete when Genghis Khan conquered the Khwarezmian Empire in 1221.
Explanation:
Answer:
The correct answer is <u>D</u>: the Maya
Explanation:
Although the first zero was found in Mesopotamia, the Mayans invented it separately from the Mesopotamian civilization in approximately 4 A.D.
They wrote zero as a shell-shaped number and used it in their Long Count Calendar as a place-holder.
For the Mayans, zero was the base for correct counting, so the first day of the month was zero, the second day was one, etc.
Answer:
The end of the French-American alliance in 1800, which ended the Quasi-War.
Explanation:
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