Syrian government forces repelled an attack by the Islamic State group on a major air base in the country's east on Dec. 6, in fighting that killed dozens on both sides, activists and state media said.
ABC News: Syrian troops repel Islamic State attack on eastern air base

A fighter of the Syrian Kurdish People's Protection Units (YPG) leaves his position after an Islamic State (IS) group's fighter started shooting in his direction on Nov. 7, 2014 in the Syrian besieged border town of Ain al-Arab.