When were they powerful and where Beginning of Assyria (2000 BC) The ancient Sumerian city of Assur came under Assyrian control by about 2000 BC, serving as the capital of the Assyrian Kingdom. Timeline About 3500 B.C.E the Sumerians settled in a small part of southern Mesopotamia (now Iraq) between the Euphrates and Tigres Rivers. First people on Earth to live in cities were the Sumerians. Their cities occupied a region called Mesopotamia (between the Tigris and Euphrates rivers), formerly only known through biblical names, can be identified on a map of modern Iraq. The use of the name "Sumer," the “land of Shinar," probably dates from about the beginning of the 3rd millennium BC. Their history has been reconstructed mainly from fragments on clay tablets and other evidence uncovered and interpreted by modern archaeology. After the fall of the last dynasty around 1900 BC, Sumerian scribes wrote chronicles of their long past. Lists of their kings and accounts edited into later Babylonian chronicles are all that survive. These claim that their kings go back more than 240,000 years before and 30,000 years after the Flood. Such figures suggest that Sumer could be as old as fabled Atlantis and Lemuria. A possible link is that Sumerian, as one of the few agglutinative languages, does resemble Polynesian. Over five millennia ago their advanced architecture, using vaults and arches, indicated a long development. Ancient Mesopotamia (Pre-2000 BC) The history of Mesopotamia describes the history of the area known as Mesopotamia, roughly coinciding with the Tigris–Euphrates basin, from the earliest human occupation in the Lower Pal eolithic period up to the Muslim conquests in the 7th century AD. This history is pieced together from evidence retrieved from archaeological excavations and, after the introduction of writing in the late 4th millennium BC, an increasing amount of historical sources. While in the Pal eolithic and early Neolithic period’s only parts of Upper Mesopotamia were occupied, the southern alluvium was settled during the late Neolithic period. Mesopotamia has been home to many of the oldest major civilizations, entering history from the Early Bronze Age, for which reason it is often dubbed the cradle of civilization. The rise of the first cities in southern Mesopotamia dates to the Chalcolithic (Uruk period), from ca. 5300 BC; its regional independence ended with the Achaemenid conquest in 539 BC, although a few native neo Assyrian kingdoms existed at different times, namely Adiabene, Osroene and Hatra. Beginning of Assyrian empire in 2000 BC Beginning of Assyria (~ 2000 BC): The ancient Sumerian city of Assur came under Assyrian control by about 2000 BC, serving as the capital of the Assyrian Kingdom. Babylon Gains Independence from Assyrian Empire (627 BC) As barbaric tribes from the north and east invaded Assyria, Babylon capitalized upon Assyria's weakened state, by gaining independence. The ruling Chaldeans (a Semitic people) also proceeded to conquer the rest of Southern Mesopotamia.