Al-Qaida-affiliated groups are redeploying their resources in rebel-held parts of Syria amid widespread fears that any strikes carried out by the U.S. would target not only the Syrian government but also Islamists in the opposition, according to rebels. In many parts of the northern ...

A rebranded version of Iraq’s al-Qaida affiliate is surging onto the front lines of the war in neighboring Syria, expanding into territory seized by other rebel groups and carving out the kind of sanctuaries that the U.S. military spent more than a decade fighting ...

The French government says it has confirmed the use of sarin gas by the Syrian government, and a U.N. panel reports that it has "reasonable grounds" to believe chemical weapons have been used in the country's civil war.

In the heart of rebel-held territory in Syria’s northern province of Aleppo, a small group of intrepid Westerners is undertaking a mission of great stealth. Living anonymously in a small rural community, they travel daily in unmarked cars, braving airstrikes, shelling and the threat ...

As this remote corner of northeastern Syria fast slides out of government control, many Syrians are bracing for what they fear will be another war, between the relatively moderate fighters who first took up arms against the government and the Islamist extremists who emerged ...

The evidence was incontrovertible, captured on video and posted on YouTube for all the world to see. During a protest against the Syrian regime, Wael Ibrahim, a veteran activist, had tossed aside a banner inscribed with the Muslim declaration of faith. And that, decreed ...