Early River Valley Civilizations 3500 bc - 450 bc

Egypt

3100 bc
2600 bc
2080 bc
1640 bc

Mesopotamia

3000 bc
2350 bc
1790 bc

Indus Valley

2500 bc
1500 bc

China

2000 bc
1532 bc
1027 bc
771 bc
771 bc
256 bc