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Mesopotamia is the first known complex civilization. -
Egyptian civilization developed along the Nile River. -
The Norte Chico civilization existed for roughly 1,200 years. -
Known for its impentrable walls. Hammurabi encircled the city with walls. -
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One of the most influential ancient civilizations of the early Americas. -
Chandragupta Maurya became the first emperor to unify India into one state, creating one of the world's largest empires in its time. -
Qin Shi Huang proclaimed himself Emporer after unifying China in 221 BC -
Founded by Liu Bang in 206 BCE who became the Gaozu emperor. -
The reign of the Roman empire began in 27 BC with the first Roman emperor, Augustus Caesar.