Sumerians (c. 4500 – 1900 BCE) Widely considered the world's first true civilization. They invented cuneiform writing, built monumental temple complexes called ziggurats, and established early influential city-states like Uruk, Ur, and Eridu. Akkadian Empire (c. 2334 – 2154 BCE) Founded by Sargon of Akkad, it is recognized as the world's first dynastic empire, uniting the independent Sumerian city-states under a single centralized rule and spreading the Akkadian language across the region. Babylonian Empire (including the Old Babylonian and Neo-Babylonian periods) (c. 1894 – 539 BCE) Famous for King Hammurabi and the Code of Hammurabi (one of the earliest and most complete written legal codes), as well as the later Neo-Babylonian rule under Nebuchadnezzar II and the cultural and architectural splendor of the city of Babylon. Assyrian Empire (specifically the Neo-Assyrian Empire) (c. 911 – 609 BCE) A highly militaristic and dominant powerhouse that built one of the largest and most terrifyingly efficient standing armies of the ancient world, innovating siege warfare, iron weapons, and massive administrative networks stretching across the Near East. Achaemenid Persian Empire (c. 550 – 330 BCE) Founded by Cyrus the Great, this vast imperial power conquered the Neo-Babylonian Empire and integrated the entirety of Mesopotamia into a massive multi-continental state known for its administrative efficiency, royal road systems, and cultural synthesis. #mesopotamia #facts #historytok - @anunnakiina