Charles Lister, a longtime Syria expert, said while most of the international community has written off the conflict as either frozen or finished, the armed opposition has never given up and has been training for such a scenario for years.
Is Syrian President Bashar Assad's rule at risk of collapse?
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Coming after years with few sizeable changes in territory between Syria's warring parties, the fighting “has the potential to be really quite, quite consequential and potentially game-changing,” if Syrian government forces prove unable to hold their ground, said Charles Lister, a longtime Syria analyst with the U.S.-based Middle East Institute.
What to know about sudden rebel gains in Syria's 13-year war and why it matters
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