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ALEPPO, SYRIA - NOVEMBER 21: Armed opposition groups linked to the al Shamiya Front (Damascus Front) and Murat Brigades attack Daesh militants in the village of Harcele in northern Aleppo, Syria on November 21, 2015. (Photo by Huseyin Nasir/Anadolu Agency/Getty Images)

ALEPPO, SYRIA - NOVEMBER 21: Armed opposition groups linked to the al Shamiya Front (Damascus Front) and Murat Brigades attack Daesh militants in the village of Harcele in northern Aleppo, Syria on November 21, 2015. (Photo by Huseyin Nasir/Anadolu Agency/Getty Images)