It has been two years since the start of the Syrian conflict. What began with peaceful demonstrations in the streets of Deraa has morphed into a nationwide conflict with sectarian, ethnic and regional overtones. In that time, tens of thousands of Syrians have been killed and more than a million forced to leave their homes. A regime that has run Syria for decades is fighting for its survival and in no mood to compromise. On the rebels side, a group of disparate forces are united by the common goal of defeating the rule of Bashar al-Assad.