Stratfor:

Russia could be in the process of greatly expanding its involvement in the Syrian conflict, according to sources from Israeli news source Ynet. An Aug. 31 report suggests that a Russian expeditionary force has already arrived in Syria, setting up camp in a loyalist air base near Damascus. If the reporting is accurate, it could be an early indication that Russia will throw its heft behind the Syrian air campaign against the Islamic State and the rebel-aligned factions in the country. According to Ynet, thousands of Russian military personnel are expected to arrive in Syria in the coming weeks, including military advisers and instructors as well as logistics and technical personnel. Additionally, members of the aerial protection division are expected, alongside pilots who will fly an unknown number of fighter aircraft and attack helicopters. It is Stratfor's assessment that Russia is steadily increasing its support for Damascus. This assistance ranges from the provision of extra materiel, weaponry and equipment to the greater sharing of intelligence on rebel positions and dispositions. Russian pilots and aircraft mechanics also have a long history of serving in foreign air forces in conflict zones, either at the behest of the government or as private contractors. Evidence that Russia is taking a more combative role is already emerging. Stratfor identified Russian-language speakers in recent combat footage obtained from Syria, further corroborating the likelihood that either Russian military personnel or Russian-speaking private military contractors are now actively involved in the conflict.