As is usually the case in theaters of combat, reality on the ground differs widely from the sharp and clear lines that are presented to uninformed outside observers. Good case in point is the state of Syrian oil. I am told by a well-informed source that the Syrian Democratic Forces led by the Kurds have been selling much of the oil in northeast Syrian territory they controlled until recently to the Syrian National Oil Company–the Assad government.
Some of that oil has also been sold to the Turks, who may be in turn shipping it by tanker truck to Iran and the Iranian are shipping it on to North Korea.
As we know, in the past, when ISIS controlled some of the Syrian oil, they were trucking it across the border to Turkey and selling it to Erdogan's minions at a steep discount. the SDF has continued doing that.
Noteworthy that President Trump thanked Russia, the Syrian Government, Turkey and Iraq for their help in the tracking and killing of Abu Bakr al-Baghdadi. Questions: What was the nature of the help? Who gave overflight permission for the U.S. teams sent in to kill or capture al-Baghdadi. Likely answers to these questions will remain classified for some time. But again, it's worthwhile as a thought exercise to think through the operational requirements and details of this successful mission. Was there a link between the Turkish assistance or silence and the lifting of sanctions announced just prior to the al-Baghdadi mission?