Welcome to Raqqa 

After a ruthless and exhausting 6 years of war in Syria, only the most ideologically strong militias have managed to flourish, absorbing various fragmented rebel factions and uniting them under strict philosophies. On the frontlines of Raqqa, a battle is raging between the American-backed coalition of Kurdish and Arab fighters known as the Syrian Democratic Forces (SDF) and the Islamic State (ISIS).
Source 

https://joeyl.com/blog/all/post/welcome-to-raqqa