A series of standoffs on Saturday saw US troops in Syria, who are there to "control the oil," confronting a Russian military convoy near the town of Rmelan. There were multiple incidents where the US forces stopped the convoy.

The belief among US forces was that the Russian convoy was trying to gain access to key oilfields in the area of Rmelan. These oilfields are among the ones that President Trump has claimed for the US.

Turkish media were the first to break the story of his confrontation. It may be that the matter is overstated, and no shots were fired by either side. Still, having US and Russian troops in close proximity hassling one another over Syrian oil is worrying, and could quickly turn into a big problem for all concerned.

Defense Secretary Mark Esper confirmed to the media that the current US mission in Syria, which President Trump has simplified to just keeping the oil, included keeping the Russians away from the oil.