The loosely-knit coalition of Syrian rebel groups known as the Syrian Democratic Forces (SDF), are armed, trained and backed by the U.S. The group is currently engaged in the early stages of battle in the ISIS stronghold of Raqqa, Syria.
Syria

UN Envoy: Syrian Rebels Need To Accept That They Didn’t Win War

“For the opposition, the message is very clear: if they were planning to win the war, facts are proving that is not the case. So now it’s time to win the peace.”