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officers and soldiers leave military to form free Syrian army with intent of bringing the regime down
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protests started, demanding democratic reforms and released of political prisoners
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Assad began using large-scale artillery operations against the insurgency
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in frustration, Annan resigns as Un Arab joint special representative for Syria
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ceasefire negotiation by Un envoy Kofi Annan comes into affect, but is repeatedly violated by government forces
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Use of chemical weapons confirmed by un
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ISIS gains control of 1/3 of Syria
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Russia intervenes with airstrike
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peace talks held in Vienna
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Turkey shoots down Russian warplane
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Peace talks in Geneva