Syria's rebel and opposition groups are trying to forge a common stance over negotiations to end the civil war but the absence of some prominent activists and a main Kurdish force from their meeting in Riyadh shows that unity remains elusive. Saudi Arabia, a strong supporter of rebels fighting...

Kurdish forces backed by U.S. air strikes declared a major victory last month over Islamic State after cutting access to a key supply route in northern Iraq. Yet days later the militants were back in business, underscoring their resilience in the face of defeat. The...

A Syrian opposition meeting due to begin in Saudi Arabia on Tuesday marks the most serious effort yet to unify President Bashar al-Assad's fragmented enemies, a step seen vital to peace talks sought by world powers but which has riled Iran. While the outlook for the political track recently...

(Foreign Affairs)- With U.S.-made antitank missiles finding their way to Syrian rebels and Russian fighter jets pummeling the same rebels and supplying the Bashar al-Assad regime with antiaircraft missile systems, it might seem easy to describe the battle in Syria as a proxy war. But that...