1917 August 23, THE CREATION OF THE JEWISH LEGION OF THE BRITISH ARMY WAS ANNOUNCED
Long championed by Jabotinsky and based on the Zion Mule Corps. The 38th Battalion was commanded by Colonel Henry Patterson. A second battalion (the 39th) commanded by Colonel Eleazar Margolin was also formed. Although at first against the idea, most of the leadership of the Yishuv, including Ben Gurion and Ben Zvi, joined after the Balfour Declaration. Over 2,700 men volunteered for the Legion. Many of them saw action in Transjordan in the fall of 1918.