Raqqa is headquarter of ISIS/ISIL. It is hotel for revolutionists as number of migrants moving there for safe during war time. Raqqa, the military and economic town of ISIS protecting by some of 200,000 troops. Thus, the government needs at least 1,000,000 soldiers to capture the city. Russian war planner said that Syria is facing of soldiers's shortage!--- this is just pre- offensive operation.