Question

why the Sumerians build cities with walls around them

Answer 1

Explanation:

To defend themselves, Sumerians built walls and dug moats around their cities. By 3000 B.C.E., most Sumerians lived in walled city-states. A Sumerian city-state was like a tiny country. Its surrounding walls helped protect the city against enemies.

Answer 2

Answer:

Sumerians began to look for ways to protect their cities from their neighbors. ... So, Sumerians began to build strong walls around their cities. The walls were made of mud bricks that were baked in the sun until they were hard. The Sumerians also dug moats outside the city walls to prevent enemies from entering the city.