i believe there is only one, mesopotamia. in latin this means "land between two rivers."
There was only one civilization that existed on the Tigris and Euphrates River. That civilization was Mesopotamia. There were three other civilizations that existed in other areas. These civilizations were the Egyptians, the Longshan, and the Harappa.
The early settlements of Mesopotamia were in between the Tigris and Euphrates rivers.
Because it was the nearest place to water.
Mesopotamia was in the Tigris Euphrates river valley because ancient civilizations needed water. The Tigris and Euphrates rivers provided that necessity to the people in that area.
Early civilizations emerged between the Tigris, Euphrates, Nile, and (sorry, blanking out out on the fourth...) Rivers.
The Tigris and Euphrates
The Tigris and Euphrates rivers are used as transportation routes It supplies drinking water
The land between the Tigris and Euphrates; site of several ancient civilizations; part of what is now known as Iraq
between the tigris and the Euphrates rive in Iraq
Tigris and Euphrates Rivers are one of them
The Tigris and the Euphrates Rivers.