Answer:
Following the defeat of the Ottoman Empire in World War I, the British assumed control of Palestine. In November 1917, the British government issued the Balfour Declaration, announcing its intention to facilitate the "establishment in Palestine of a national home for the Jewish people." In 1922, the League of Nations granted Britain a mandate over Palestine which included, among other things, provisions calling for the establishment of a Jewish homeland, facilitating Jewish immigration and encouraging Jewish settlement on the land.