Moreover, the finding now links the decline of the Indus cities to a documented global scale climate event and its impact on the Old Kingdom in Egypt, the Early Bronze Age civilizations of Greece and Crete, and the Akkadian Empire
in Mesopotamia, whose decline has previously been linked to abrupt climate change.
Still others used data from tree rings in Southeast Asia to gauge the influence of severe drought on the collapse of the Angkor kingdom, or analysed sediment from Middle Eastern seas to determine how desertification influenced the fall of the Akkadian Empire
more than 4,000 years ago.
The period after the collapse of the Akkadian empire
about 2200 BC was known even then as the seven generations since the Fall of Akkad.
Likewise the Akkadian Empire
conquered the Sumerians (technically the Sag Giga peoples) and ruled much of Iraq and half of Syria in the Third Millennium B.
The narrative itself is organized chronologically, with chapters on geography and prehistory (chapter 1), the Uruk period (chapter 2), the Early Dynastic period (chapter 3), the Akkadian empire
and Third Dynasty of Ur (chapter 4), the Old Babylonian period (chapter 5), the Late Bronze Age (chapter 6), Assyria (chapter 7), the Neo-Babylonian period and Persian Empire (chapter 8), the Hellenistic and Parthian kingdoms and Roman Empire (chapter 9), and the Sassanian Empire (chapter 10).
The subsequent chapters focus on the city-states of the early third millennium, followed by the Akkadian Empire
and continuing through the Assyrians, Neo-Babylonians, Achaemenids, Seleucids, Parthians, Romans, Sasanians, concluding with Byzantium and the arrival of Islam.
King Narim-Sin of the Akkadian Empire
was known as "the god of Agade.
The head from the Akkadian Empire
, unearthed by Iraqi archaeologists in 1982, has been united with a replica of a headless torso discovered over a century ago, Baghdad Museum curator Mohsen Hassan Ali told AFP.