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In page Mongols:

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The Dayan Khanid aristocracy still held power during the Bogd Khanate of Mongolia (1911–1919) and the Constitutional Monarchy period (1921–1924). They were accused of collaboration with the Japanese and executed in 1937 while their counterparts in Inner Mongolia were severely persecuted during the Cultural Revolution. Ancestral shrines of Genghis Khan were destroyed by the Red Guards during the 1960s and the Horse-Tail Banner of Genghis Khan disappeared.[citation needed]