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The Siege of Damascus (634) lasted from 21 August to 19 September 634 AD b[âº] before the city fell to the Rashidun Caliphate. Damascus was the first major city of the Byzantine (Roman) empire to fall in the Muslim conquest of Syria.
The loss of Aleppo is a major strategic defeat for the rebels. It was the most densely populated and prosperous region under their control, their most prized possession. They managed local services and their half of the city served as a sort of de facto capital. Their defeat is telling on a number of levels.