While the U.N's 2 million figure is itself massive in terms of past refugee movements, it belies the fact that more than 4 million people that have been displaced within the country.
Chatty said internally displaced persons are even more difficult to reach and support, despite the efforts of international organizations and the Syrian Arab Red Crescent, a Syrian non-profit humanitarian organization.
"Syria is in an internal displacement crisis," said Syria analyst Guillaume Charron, in an Aug. 16 press release put out by the Internal Displacement Monitoring Centre (IDMC), a leading international monitor of displacement resulting from conflict.
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