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The British 1939 White paper stipulated that Jewish immigration to Palestine was to be limited to 15,000 a year for the first five years, and would subsequently be contingent on Arab consent. Restrictions were also placed on the rights of Jews to buy land from Arabs. After this Ben-Gurion changed his policy towards the British, stating: "Peace in Palestine is not the best situation for thwarting the policy of the White Paper". Ben-Gurion believed a peaceful solution with the Arabs had no chance and soon began preparing the Yishuv for war. According to Teveth "through his campaign to mobilize the Yishuv in support of the British war effort, he strove to build the nucleus of a 'Hebrew Army', and his success in this endeavor later brought victory to Zionism in the struggle to establish a Jewish state."