21st century BC c.

The 21st century a. C. began on January 1, 2100 a. C. and ended on December 31, 2001 a. c.

Relevant events

• 2100 B.C.: The caralens begin to leave the city of Caral (the mother of the Caral Supe civilization (the oldest in America).
• 2100 B.C.: In the Aegean Sea, 35 km northeast of Heraclion (capital of Crete) an earthquake of magnitude 7,1 occurs in the seismological scale of Richter. The number of dead is unknown. See Earthquakes prior to the 20th century.
• 2095 B.C.: dies Ur-nammu.
• 2094 a. C.: Shulgi, the son of Ur-nammu, ascends to the throne of the third dynasty of Ur.
• 2047 BC: Shulgi dies.
• 2046 B.C.: Amar-Sin, the son of Shulgi, rise to the throne of the third dynasty of Ur.
• 2037 B.C.: Amar-Sin dies.
• 2037 B.C.: Shu-Sin, Amar-Sin's brother, rise to the throne of Ur's third dynasty.
• 2026 BC: Shu-Sin dies and his brother Ibbi-Sin rises to the throne.
• 2004 B.C.: Sumerian civilization comes into decline after the elamites plunder Ur in the reign of Ibbi-Sin.
• 2000 B.C.: 15 km west of Asjabad (capital of current Turkmenistan) 38°00′N 58°12′E / 38.00, 58.20 A magnitude 7.1 earthquake occurs on the Richter scale. Less than 1000 dead.

Science and technology

• in Mesopotamia (present-day Iraq): Shulgi (2094-2047 B.C.), king of Sumer and Achad, introduces the gur (‘weight’) as volume measure (1gur= 200 litres).
• in the West of Sumeria (Sudo-West of Iraq): Shu-Sin (2037-2026), king of Súmer and Achad, commands to build a wall of 270 km long known as Muralla de los Martu, created to contain the incursions of the Amorite and Tidnum nomads, coming from the Arabian desert.

Wars and politics

• 2071 B.C.: According to Geoffrey Keating, Magh Ithe, Ireland's first (mitological) battle, is waged.
• Successive wars between the Empire of Ur III and the nomadic peoples of the Zagros mountains.
• Amar-Sin, King gives the III Dynasty of Ur, conquers and sweeps the city of Arbela to stifle the revolt of the coalition of nomadic peoples of the Zagros mountains.
• Constant wars between the Empire of Ur III and the Martu, which—providers of the arabic desert— threatened the western border. Invaden Akkad (midth centuryXXIa. C.) and subsequently, Sumeria (ends of this century) taking, among others, the city of Ur (2004 B.C.), in coalition with Elam, the nomadic villages of the Zagros Mountains, and the City of Isin. This fact puts an end to the Third Dynasty of Ur (the last dynasty of this city) and thus to the Empire of Ur III.

Relevant people

• Shulgi, king of Sumeria and Akkad.