Jewish Combat Organization
There were separate resistance groups organized by Polish Jews: the right-wing "Żydowski Związek Walki" ("Jewish Fighting Union") (ŻZW) and the more Soviet-leaning "Żydowska Organizacja Bojowa" ("Jewish Combat Organization") (ŻOB). These organisations cooperated little with each other and their relationship with the Polish resistance varied between occasional cooperation (mainly between ZZW and AK) to armed confrontations (mostly between ŻOB and NZS).