Jewish Fighting Organization (ZOB)

Formed by youth groups in the Warsaw Ghetto after the start of massive deportations of Jews to Treblinka in July 1942, the Jewish Fighting Organization (Polish: Zydowska Organizacja Bojowa or ZOB) advocated armed resistance and self-defense and was connected to the Polish underground. When German troops and police entered the Warsaw Ghetto on April 19, 1943 to round up the remaining population for deportation, they were attacked by ghetto fighters. ZOB cells were able to hold out for a month but the uprising was eventually crushed by the Nazis. The remaining Jews in the ghetto were deported to killing centers or condemned to forced labor and the ghetto was completely destroyed.