Russian President Vladimir Putin and Turkish President Recep Tayyip Erdogan agreed to jointly patrol an area in northern Syria previously controlled by Kurdish forces with U.S. support.
Weeks ago, Turkey threatened to send its military over the border if Kurdish militants didn't leave Manbij. Now the U.S.-backed Kurds seem to be making a deal with the Syrian regime.
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.