Turkey-backed rebels await 'zero hour' to attack Syria's Manbij

The decision will depend on Turkey, the main backer of Abu Faisal's group, and on how contacts evolve between Washington and Ankara over the United States' plans to withdraw forces from Syria, a move set to reshape a major theater of the war. The YPG fear the U.S. withdrawal will open the way for a threatened Turkish attack into northern Syria, including Manbij, but U.S. President Donald Trump has warned Turkey of "economic devastation" if it goes ahead with the attack.