Sargon II was an ancient Assyrian king who reigned from 721 to 705 BCE. He is known for his military conquests and the expansion of the Assyrian Empire, which reached its peak during his rule. Sargon II founded the city of Dur-Sharrukin, which served as the empire's capital and was known for its impressive architecture. Sargon II is also recognized for his administrative reforms and efforts to consolidate power. He successfully dealt with various rebellions and maintained control over a vast territory, including parts of Israel and Babylonia. His reign marked a significant period in the history of the Neo-Assyrian Empire.