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Jan 1, 1054
A supernova is observed by the Chinese, the Arabs and possibly Amerindians near the star Tauri. For several months it remains bright enough to be seen during the day. Its remnants form the Crab Nebula.
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Jan 1, 1100
Aztecs left homeland in search of new home.
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Jan 1, 1142
Execution, believed wrongful, of noted Song Dynasty General Yue Fei.
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Jan 1, 1195
Aztecs arrived in Valley of Mexico.
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Jan 1, 1200
Northern Maya cities begin to be abandoned.
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Jan 1, 1250
Aztecs settled near Lake Texcoco.
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Jan 1, 1276
While taking exile in Fuzhou in southern China, away from the advancing Mongol invaders, the remnants of the Song Dynasty court hold the coronation ceremony for the young prince Zhao Shi, making him Emperor Duanzong of Song.
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Jan 1, 1279
A Mongolian victory in the Battle of Yamen ends the Song Dynasty in China.
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The coronation of Zhao Kuangyin as Emperor Taizu of Song, initiating the Song Dynasty period of China that would last more than three centuries.
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In China, the war elephant corps of the Southern Han are soundly defeated at Shao by crossbow fire from Song Dynasty troops.
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Period: to Jan 1, 1279
Song Dynasty
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Period: to Jan 1, 1279
The Americas