The Neo-Assyrian Empire was the fourth and penultimate stage of ancient Assyrian history. Beginning with the accession of Adad-nirari II in 911 BCE, the Neo-Assyrian Empire grew to dominate the ancient Near East and parts of the South Caucasus, North Africa and the Eastern Mediterranean throughout much of the 9th to 7th centuries BCE, becoming the largest empire in history up to that point. Because of its geopolitical dominance and ideology based in world domination, the Neo-Assyrian Empire has been described as the first world empire in history. It influenced other empires of the ancient world culturally, administratively, and militarily, including the Neo-Babylonians, the Achaemenids, and the Seleucids. At its height, the empire was the strongest military power in the world and ruled over all of Mesopotamia, the Levant and Egypt, as well as parts of Anatolia, Arabia and what is now Iran and Armenia.