Sumerian Timeline 2550 to 1595 B.C.
- 2550 - Mesalim rules Kish
- 2475 - Ur-Nanshe rules Lagash, Meskalamdug rules Ur, military conflict between Lagash and Umma continues a long time.
- 2375 - Lugalzagesi of Umma unifies Sumer briefly
- 2350 - Sargon of Agade defeats Umma and takes over Sumer and Akkad and creates significant political and economic empire
- 2230 - Gutian invasion disrupts unity of Sumer and Akkad
- 2175 - Gudea rules Lagash
- 2110 - Ur-Nammu of Ur unifies Sumer and Akkad
- 2030 - Elamites disrupt unity of Sumer and Akkad
- 2020 - Ishbi-Erra the Amorite ruler of Isin seeks to rebuild unity in the land
- 1795 - Rim-Sin of Larsa defeats Isin and takes over Sumer and Akkad
- 1760 - Hammurapi of Babylon defeats Larsa and takes over Sumer and Akkad
- 1720 - Shift of Euphrates River and collapse of life at Nippur and other cities of Sumer
- 1595 - Hittite raid disrupts unity of Sumer and Akkad