Mesopotamia, the region of the Tigris and Euphrates rivers in southwestern Asia.

All definitions include Mesopotamia, the land in and around the Tigris and Euphrates rivers.

The Tigris and Euphrates rivers both run through the center of the country.

This region, consisting of the land between the Tigris and Euphrates rivers, was one of the first centers of civilization.

You also credit the valley of the Tigris and Euphrates rivers in Iraq as "the place where historical time began."

Most battles in Mesopotamia had been tied to the Tigris and Euphrates rivers.

Mesopotamian agriculture was both supported and limited by flooding of the Tigris and Euphrates rivers.

Along the Tigris and Euphrates rivers, the area was littered with hundreds of pure bitumen seepages.

Its ruins stand in Iraq, between the Tigris and Euphrates rivers.

Sumer grew crops on the Tigris and Euphrates rivers.