The past few days have seen a steep increase of evidence revealing the true extent of direct military involvement by the Russian military on the ground in Syria. The sighting of recently delivered Russian UAVs and Russian BTR-82Ainfantry fighting vehicles (IFVs) in addition to sound fragments confirming Russian military personnel directly participated in one of regime's offensives in the Lattakia Governorate all proved Russia was deeper involved in the Syrian Civil War than many previously thought.
Bellingcat: Sighting of R-166-0.5 signals vehicle affirms inflow of Russian military into Syria

A handout picture released by the Syrian Arab News Agency (SANA) shows Syrian President Bashar al-Assad (R) giving an interview to Russian media outlets on Sept. 15, 2015 in the capital Damascus.