The civil war in Syria has been raging for over four years now and has shown no signs of abating.
An incredibly complex web of belligerents within the country is further muddied by the involvement of international actors.
The broad picture is one of western-backed rebel groups fighting an insurgency against the government forces of President Bashar al-Assad while trying to stem the growth of the so-called Islamic State (IS).
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Within this, however, are nationalist groups, numerous Islamist factions, militias and of course, innocent civilians.
In total the conflict has resulted in the deaths of nearly 300,000 people.
This weekend 19 global powers are meeting in Vienna in an attempt to solve the crisis with Russia warning the US that the conflict could turn into a proxy war.
Russia insists that Syria's president remain in power in any future settlement while the US-led coalition says he must relinquish power if there is any hope of peace.