Haganah (Hebrew: "The Defense", ההגנה HaHagana) was a Jewish paramilitary organization in what was then the British Mandate of Palestine from 1920 to 1948, which later became the core of the Israel Defense Forces.
Read more about Haganah: Origins, 1920 and 1921 Arab Riots, 1931 Irgun Split, 1936–1939 Arab Revolt in Palestine, 1939 White Paper, World War II Participation, 1944 Lord Moyne Assassination, Jewish Resistance Movement, Post World War II, Pal-Heib Unit