Haqanah

Haganah evolved from the League of Nations Mandate for Palestine which was administered by Great Britain. Article 4 of the League of Nations Mandate for Palestine recognized a public body for the purpose of advising and cooperating with the Administration of Palestine in such economic, social and other matters as may affect the establishment of the Jewish national home...and...to assis and take part in the develop-merit of the country."

Although the Haganah had no legal status and was not recognized by the British mandatory authority, it was tolerated by the British because its "aims were defensive." 

Concurrent with the 1936-39 Arab Revolt, Haganah Command tightened its control over its combatants and Special Night Squads were organized in conjunction with the British to retaliate against the Arabs. The Jewish squads were equipped an trained by the British under Captain Charles Orde Wingate. Initially, 2800 Jews were enrolled as constables by the British to com bat the Arab insurgents. This number eventually rose to 5000 at the peak of the violence. In 1936, Haganah strength was 10,000, including reserves.