Reports of a Turkish build up on the border east of the river in preparation for a christmas offensive.
"Top administration officials, including President Trump, scrambled this week to head off a Turkish attack against U.S. Kurdish allies in northern Syria, after Turkish President Recep Tayyip Erdogan announced an imminent assault."
YPG are reportedly pulling troops out of the fight against ISIS to turn and reinforce the border with Turkey. Erdogan seems determined to keep the ISIS dream alive.