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Analysts say the past 12 months have been transformative - with Russia's military intervention and pressure from the migrant crisis pushing world powers into renewed peace efforts.
Inspired by the Arab Spring uprisings of six years ago, protests erupted against President Bashar al-Assad's regime on March 15, 2011.
A brutal crackdown sparked the civil war, which has since left more than 270,000 people dead and forced millions to flee towns and cities devastated by bombing and clashes. (READ MORE)