Here is what it was like in the northern part of the country as the Syrian military started advancing to retake territory after the U.S. made way for Turkey's incursion against the Kurdish forces.
The Turkish military has taken control of Afrin, a city in northwestern Syria. An advocacy group says nearly 200,000 people have been displaced by the fighting.
While hundreds of Americans have tried to join ISIS, the Kurdish People's Protection Units, also known as YPG, have recruited people around the world to fight against the extremist group in Syria.
