Earlier this week, a convoy of less than 50 Russian Marines arrived to the Kuweires Military Airport in the Aleppo Governorate's eastern countryside in order to provide the necessary military advisers to expand the Syrian Arab Army's operations in the Al-Bab Plateau and the Deir Hafer Plains.
According to a military source in east Aleppo, the Russian Marines brought a substantial amount of advanced missiles and rockets with them to the Kuweires Military Airport; these missiles have very little do with combating the Islamic State of Iraq and Al-Sham (ISIS) terrorists near the airbase and far more to do with protecting their aerial assets.
Conflicting reports regarding the arrival of S-300 missiles have been confirmed by a local military source as incorrect; however, he did add that the likelihood of these advanced anti-aircraft missiles arriving to the Kuweires Military Airport is very likely in the coming weeks, as the Russian Marines swell the number of soldiers in eastern Aleppo.
Should the S-300 anti-aircraft missiles arrive to the Kuweires Military Airport, the Turkish military will likely be on high alert because just north of the ISIS stronghold of Al-Bab is the Jarabalus border-crossing, which is currently the target of the predominately Kurdish "People's Protection Units" (YPG) and the U.S. backed "Syrian Democratic Forces" (SDF).
Turkey is not happy about the YPG's expansion in northern Syria; so if ISIS loses the Jarabalus border-crossing, the Turks will be forced to deal with another Kurdish military presence on their border.