The moderate rebel command at the center of U.S. policy in Syria is becoming increasingly marginalized as dozens of militias peel away to form rival, Islamist alliances in a move that could leave the ...

The Idlib attack was not the first assault by al-Qaida's fighters — the militants have on several occasions since late 2014 defeated moderate rebel factions, including those backed by the United ...

President Obama has long been reluctant to provide substantial aid to Syria's so-called moderate rebels, often dismissed as weak and disorganized. But the rapid rise of the group that calls itself the ...