Abraham Blum

Together with the leader of the Bund, Szmul Zygielbojm, and with support from Warsaw's mayor Stefan Starzyński, he helped to organize all-Jewish detachments that defended the Polish capital against the German assault.

Along with other Bund activists Blum continued to edit the party's newspaper, the Folkszajtung ("the People's Gazette") ensuring that it did not cease publication during the siege.

Blum, who was their leader, has been credited with ensuring the Warsaw Bund's survival during this difficult time.

Most likely, together with Maurycy Orzech, he was one of Bund's representatives in negotiations with the Anti-Fascist Block (an alliance between leftist-Zionist, communist and socialist Polish Jewish parties).

[6][7] He was considered by many Bundists and other leftist activists, including Marek Edelman for whom Blum was a "spiritual leader",[8] to be one of the main intellectuals of the Block.

[12] Blum tried to escape through the window on a rope made from bedsheets but broke his legs in the fall from the third story and was captured.

Abraham Blum's symbolic grave at Okopowa Street. Inscription reads "Abrasza Blum, eng., 1905-1943. Member of the underground coordinating committee of the Bund in Poland. Leading activist in the resistance of the Warsaw Ghetto. Died in the heroic struggle against the Nazi occupiers."