ŻZW
Two Jewish underground organisations fought in the Warsaw Uprising: the left wing Żydowska Organizacja Bojowa (ŻOB) founded in July 1942 by Zionist Jewish youth groups within the Warsaw Ghetto; and the right wing Żydowski Związek Wojskowy (ŻZW), or Jewish Military Union, a national organization founded in 1939 by former Polish military officers of Jewish background which had strong ties to the Polish Home Army, and cells in almost every major town across Poland. However both organisations were officially incorporated into the Polish Home Army and its command structure in exchange for weapons and training.