AP World Chapter 2 By HistoryTime10 4000 BCE Year 4000 Period: 3500 BCE to 3000 BCE Mesopotamia Period: 3000 BCE to 2750 BCE How Long the United States Has Been a Country Period: 2750 BCE to 2500 BCE United States 2 Period: 2500 BCE to 2250 BCE United States 3 Period: 2250 BCE to 2000 BCE United States 4 2200 BCE Beginning of Chinese Civilization 2000 BCE Epic of Gigamesh Period: 2000 BCE to 1750 BCE United States 5 Period: 1750 BCE to 1500 BCE United States 6 1500 BCE Egyptian Empire Period: 1500 BCE to 1250 BCE United States 7 1200 BCE Olmec 1 CE Year 1