Syrian Army soldiers monitor residents who said they have received permission from the Syrian government to leave the besieged town as they wait with their belongings after an aid convoy entered Madaya, Syria, January 14, 2016.Omar Sanadiki / Reuters

Article initially published in Foreign Affairs on March 29, 2016 and written by Annie Sparrow.

Besieging civilians—cutting them off from food, supplies, and fuel—is a war crime. It is also a strategy that several parties to the conflict in Syria use, chief among them the Syrian government. Estimates of the number of Syrians currently living under siege vary widely, according to who is doing the reporting. For example, last December, the United Nations Office for the Coordination of Humanitarian Affairs (OCHA) in Damascus communicated back to the UN secretary-general’s office that 393,700 civilians were besieged. For the same period, Siege Watch estimated that the real figure was more than one million.

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