period 861–870 in the history of the Abbasid Caliphate, which was marked by extreme internal instability and the violent succession of four caliphs, who became puppets in the hands of powerful rival military groups English
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    /m/0kvkvsp
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    Q15241312 (Deleted Item)
    28 October 2013
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    861
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    870
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    Q170047 (Deleted Item)
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