The Jewish Fighting Organization, known as the ZOB (Zydowska Organizacja Bojowa), was a group formed in 1942 in the Warsaw Ghetto, primarily made up of Jewish resistance fighters who opposed the Nazi regime during the Holocaust. This organization played a crucial role in the Warsaw Ghetto Uprising in 1943, where they fought against deportations to extermination camps, demonstrating courage and resilience in the face of overwhelming odds.