(Hussein Malla | The Associated Press) In this Wednesday, April 4, 2018 file photo, a U.S. soldier, left, sits on an armored vehicle behind a sand barrier at a newly installed position near the front line between the U.S-backed Syrian Manbij Military Council and the Turkish-backed fighters, in Manbij, north Syria. An American military official said Friday, Jan. 11, 2019 that the U.S.-led military coalition has begun the process of withdrawing troops from Syria.