20th century BC

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{{centuryBCbox | cp = 21st century BC | c = 20th century BC | cna = 19 | cnb = th century BC }} (3rd millennium BC - 2nd millennium BC - 1st millennium BC)

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Events

• 2064 – 1986 BC -- Twin Dynasty wars in Egypt.
• 1991 BC -- Egypt: Pharaoh Mentuhotep IV died. End of Eleventh Dynasty. Pharaoh Amenemhat I started to rule. Start of Twelfth Dynasty.
• 1932 BC -- Amorite conquest of Ur.
• 1913 – 1903 BC -- Egyptian-Nubian war.
• 1900 BC -- Achaean invasions of Greece.
• around 1900 BC -- Fall of last Sumerian dynasty.

Significant persons

• Jacob, patriarch in Christianity and Judaism.

Inventions, discoveries, introductions

• 1950 BC -- The copper bar cubit of Nippur defines the Sumerian cubit as 51.72 cm

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ca:Segle XX aC

de:20. Jahrhundert v. Chr. et:20. sajand eKr es:Siglo XX adC fa:سده‌ی ۲۰ (پیش از میلاد) fr:XXe siècle av. J.-C. he:המאה ה-20 לפנה"ס nl:20e eeuw v. Chr. ja:紀元前20世紀 pl:XX wiek p.n.e. pt:Década de 1920 a.C. ru:XX век до н. э. fi:1900-luku eaa