A small mound and memorial (only 350m from POLIN), marks the site of the large bunker from which the Warsaw Ghetto Uprising was lead by the Jewish Combat Organisation (ŻOB - Żydowska Organizacja Bojowa). Located beneath the tenement at the wartime address of ul. Miła 18 (today Miła 2), the bunker was discovered and surrounded by the Nazis on May 8, 1943, (three weeks after the start of the Uprising), with about 300 people hiding inside. Given the chance to surrender, about half of the occupants - mostly civilians - gave themselves up, but the ŻOB insurrectionists chose to stay and fight. When the Nazis used gas to force them out, many of the ŻOB fighters chose suicide. 120 fighters died, including ŻOB commander Mordechai Anielewicz and his girlfriend Mira Fuchrer; only about 15 survived (many of whom perished later). The bodies of the dead were never exhumed and covered over with rubble from the surrounding tenements to make this mound after the war. Today two monuments can be found on/near the memorial with inscriptions commemorating their sacrifice.