Who were the four main emperors in mesopotamia and what were their main achievements?

They were the Akkadian Empire, the Babylonian (bah-buh-LOH-nyuhn) Empire, the Assyrian (uh-SIR-ee-un) Empire, and the Neo-Babylonian Empire.

Beginning around 5,500 years ago, the Sumerians built cities along the rivers in Lower Mesopotamia, specialized, cooperated, and made many advances in technology. The wheel, plow, and writing (a system which we call cuneiform) are examples of their achievements.

Explanation:

the use of email to replace slower surface mail.