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How many prisoners of war did Fridtjof Nansen help repatriate from Russia after World War I?

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Nansen, Fridtjof — Fridtjof Nansen Fridtjof Nansen, 1915.

As the high commissioner for the League of Nations, Fridtjof Nansen was tasked with the repatriation of approximately 500,000 prisoners of war from Russia following World War I. By September 1922, he successfully completed this mission, having overseen the repatriation of 427,886 prisoners.1