Vilna Ghetto
During the invasion of Poland by Germany in 1939, Korczak fled to Lituania and met Vitka Kempner in Vilna thanks to "HaShomer HaTzair". Upon Germany's invasion of the Soviet Union, she co-founded the United Partisan Organization (FPO) with Abba Kovner and Kempner in 1942. They smuggled weapons into the Vilna Ghetto and smuggled Jews out.