What's at stake in
the battle for Aleppo?

"Rebels say IS militants aren’t taking on Assad’s forces, despite being in a strong position to menace their supply lines into the city. “When they first showed up, they claimed that they would lead the revolution to victory against the criminal regime, but then they turned on us in order to establish their so-called caliphate,” says Free Syrian Army fighter Hassan al-Halebi, who is fighting IS near the village of Telalin. 

He says rebel forces have been “split into two camps: one dedicated to fighting the regime and the other dedicated to fighting IS. We’ve lost many fighters.” He adds, “IS has killed the revolution in every area that comes under their control.” "