Alwaght-Russia will deliver the newest helicopters, airplanes, and S-300 anti-aircraft systems to Syria, if the anti-ISIS coalition including America and its allies attacks Syrian army, while fighting against ISIS strongholds.
On the one hand, Russia will not join the Washington-led coalition of airstrikes against ISIS terrorist groups' strongholds in Syria and Iraq. Russian military power in the Mediterranean region will be strengthened, on the other hand. Russia suggested Turkey that it should not join the Washington-led coalition of military actions against ISIS terrorist group in Syria.
It is necessary to mention that Iran and Russia will not let the Washington-led coalition, fight against the Syrian government, and its army. America, its allies in West Asia including Saudi, UAE, Turkey, etc. are aware of Iranian and Russian sensitivity in this regard.