Before World War II, he was a General Jewish Labour Bund activist.
|The last survivor of the Warsaw Ghetto Uprising- Marek Edlemen z'l (died 2009)|
During the war he co-founded the Jewish Combat Organization (ŻOB). He took part in the 1943 Warsaw Ghetto Uprising, becoming its leader after the death of Mordechaj Anielewicz. He also took part in the city-wide 1944 Warsaw Uprising."
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