On Nov. 15, Russian military police were reported to have taken control of the Metras military airfield in the vicinity of Sarrin, 30 kilometers (19 miles) south of Kobani, officially known as Ain al-Arab. The air base is located far to the west of the oilfields that the United States had promised to shield from Islamic State, Russian and Assad forces. Until recently the airfield was used by American troops who could monitor and keep track of ground lines of communications stretching to the Syrian-Turkish border, which supply pro-Assad and Russian forces, deployed between Ain al-Arab and Tell Abyad. Hence, the takeover of the base vacated by the United States was painted by Russia’s mass media as a significant achievement. A more critical assessment, however, suggests the Russian operation is still fraught with many new risks.
Russia is also enjoying the use of two former US bases in Manbij and Tabqa, and the Russian military police takeover of the Sarrin base, allowing Russian-backed forces to dominate part of the strategic M4 highway, raises speculation about whether this was a product of some kind of US-Russia agreement. After the United States abandoned the Sarrin base in late October, it remained unoccupied for a while. On Nov. 1 the base saw a return of US troops, with the alleged aim of using the airfield to deliver supplies needed to establish new military footholds in eastern Syria. Then US troops left the facility again shortly before the Russian military police arrived at the site.