Haganah
Defense force
Haganah was the main Zionist paramilitary organization that operated for the Yishuv in the British Mandate for Palestine. Wikipedia
Founders: Ze'ev Jabotinsky and Eliyahu Golomb
Founded: June 15, 1920
Active: 1920–1948
Role: Defense of Palestinian Jews throughout the British Mandate
Size: 21,000 (average)