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1200 BCE- 400 BCE:The Olmec civilization began at some time between 5100 BCE and 4600 BCE(The first people were there by around 8,000-400 B.C.)They had the first civilization in the Americas. The Olmec inherited Southern Mexico.
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1200 BCE: With the building of San Lorenzo, big things began to happen. The civilization began to spring to other parts of the area. The spread from the grouping of ancient villages to along the coast of the Gulf of Mexico
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650 BCE - 900 BCE: The Olmec might have been the first civilization in the western hemisphere that made up a writing system. People found two symbols in 2002 and 2006. The symbol they found in 2002, had many things shown on it, such as a bird, speech scrolls, and much more.
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300 BCE- 400 BCE: Their second capital, La Venta, is destroyed. Also all their monuments were defaced too. This is where the Olmec Civilization ends.