The Białystok Ghetto uprising was an insurrection in the Jewish Białystok Ghetto against the Nazi German occupation authorities during World War II. The uprising was launched on the night of August 16, 1943 and was the second-largest ghetto uprising organized in Nazi-occupied Poland after the Warsaw Ghetto Uprising of April–May 1943.[2] It was led by the Anti-Fascist Military Organisation (Antyfaszystowska Organizacja Bojowa), a branch of the Warsaw Anti-Fascist Bloc.[3]