The Fareynikte Partizaner Organizatsye (; "United Partisan Organization"; referred to as FPO by its Yiddish initials) was a Jewish resistance organization based in the Vilna Ghetto that organized armed resistance against the Nazis during World War II. The clandestine organisation was established by Communist and Zionist partisans. Their leaders were writer Abba Kovner, Josef Glazman and Yitzhak Wittenberg. Establishment of the FPO The FPO was formed on January 21, 1942, in the Vilna Ghetto. It took on the motto: "We will not allow them to take us like sheep to the slaughter." This was the first Jewish resistance organization that was established in the ghettos of Nazi-occupied Europe during World War II, followed by Łachwa underground formed in August 1942. Unlike in other ghettos – where the underground resistance was coordinated to some extent with the officials of the local Jewish establishment – Vilna's Jacob Gens, head of the ghetto, cooperated with German officials in stopping armed resistance. The FPO brought together Socialist Zionists, right-wing Revisionist Zionists, Communists/Marxists and Bundists. It was headed by Yitzhak Wittenberg, Josef Glazman, and Abba Kovner. The goals of the FPO were to establish self-defense in the ghetto, to sabotage German industrial and military activities and to join the partisan and Red Army’s fight against the Nazis. Abe (Abba) Kovner, the movement's leader, along with 17 members of the local Zionist group Hashomer Hatzair, stationed at a Polish Catholic convent for an order of Dominican Sisters, sheltered from the Nazis by Mother Superior Anna Borkowska (Sister Bertranda), who was the first to supply hand grenades and other weapons to the Vilnius ghetto underground. Crushing of the revolt The FPO did not succeed in its mission. In early 1943, the Germans caught a resistance member in the forest. The Judenrat, one of the widely used administrative agencies imposed by Nazi Germany, in response to German threats, gave Wittenberg over to the Gestapo. The Fareynikte Partizaner Organizatsye organized an uprising. The FPO was able to rescue Wittenberg through an armed struggle and were then able to set up a small militia. The Judenrat did not tolerate this, because the Nazis gave them an ultimatum to end the resistance or face extermination. The Judenrat knew that Jews were smuggling weapons into the ghetto and when a Jew was arrested for the purchase of a revolver, they finally gave the FPO an order to withdraw. The Judenrat turned the