Sumerian culture flourished in Mesopotamia 3000 BC. Life between the rivers was characterized by their capricious behavior, usually they were an inexhaustible source of fertile soil, but sometimes they could flood with devastating results.
When the rivers overflowed each year, the water was diverted using canals that led to basins where the water was saved for the following dry season.
The Sumerians lived in peace for a long time, but gradually conflicts arose with the neighboring peoples. One of the earliest known wars was with the Elamites, a people who lived in what is now western Iran.
This border has been disputed ever since, probably the most disputed border in world history. The Sumerian dominance was also challenged by the Akkadians.
investigative Tomas Fredriksson 