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In page Homs revolts (854–855):

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Homs was the scene of further revolts in 862 and 864, in the course of which one governor, Kaydar ibn Abdallah al-Ushrusani, was expelled and a second, al-Fadl ibn Qarin al-Tabari, was killed.[4] The city subsequently drifted out of Abbasid control in 878, when Syria was annexed by the Tulunid emir Ahmad ibn Tulun.[5]