U.S. troops last weekend reportedly found themselves in a standoff with Russian forces trying to gain access to key oil fields in northeastern Syria. The Saturday standoff — first reported by Turkish media outlets, citing unnamed local officials in the Turkey-Syria border region — seems to have ended without any shots being fired or any real risk of violence between the two sides. American military personnel reportedly stopped a Russian convoy near the town of Rmelan, and the Russian forces then apparently turned back and returned to their home base. Still, the near-clash serves as a reminder of the high...