How a clandestine militia of farmers transformed into the modern Israel Defense Forces

History · Published 3 October 2026 Swipe more like this →

In short: Born in 1920 to protect Jewish settlements in Palestine, the Haganah evolved from a localized, poorly armed defense group into a sophisticated underground army. By 1948, this paramilitary organization had successfully transitioned into the core of the newly established Israel Defense Forces, reshaping the region's military history forever.

The Haganah originated from earlier self-defense groups like Bar-Giora and Hashomer, which operated during the Ottoman era. Initially, it functioned as a loose network of farmers guarding their own kibbutzim under a policy of self-restraint. However, the 1929 Palestine riots acted as a catalyst, forcing the organization to expand its membership and develop a more centralized structure. By the 1936–1939 Arab revolt, the Haganah had matured into a force capable of fielding 10,000 mobilized men and 40,000 reservists, supported by clandestine arms shipments from Poland.

The organization's relationship with British authorities was complex and often contradictory. While the Haganah cooperated with the British during World War II—even forming the elite Palmach strike force to counter potential Axis threats—the 1939 White Paper, which restricted Jewish immigration, turned them into insurgents. This period saw the Haganah orchestrate the Aliyah Bet program, bringing approximately 100,000 Jews to Palestine in defiance of British blockades. Simultaneously, internal tensions led to the 'Saison,' a period where the Haganah actively suppressed radical groups like the Irgun to maintain political control.

As the British Mandate neared its end, the Haganah underwent a final, rapid transformation into a conventional military. In late 1947, David Ben-Gurion initiated obligatory conscription, and the organization was reorganized into infantry brigades. By the time the Israel Defense Forces were formally created on 26 May 1948, the Haganah had already established the command structure and tactical experience necessary to secure the new state. This evolution from a territorial militia to a national army was marked by the integration of diverse units, including the Palmach, into a unified military force.

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