In reality the Ottoman Province of Palestine was divided three times between the end of WWI and 1948. In 1923, Churchill gave the land east of the Jordan River to Emir Abdullah of the Hashemite Tribe, to reward him for the Hashemite support of Britain during WWI. In 1948, Britain had lost control of what was left of "Palestine" and threw the question to the UN. The UN voted to divide the remainder of Palestine AGAIN; the result was two states - one Jewish and one Arab. (The Arabs refused to accept this division, and Abdullah saw opportunities to enlarge his own state.)

After the Israeli War of Independence, Abdullah, who had then declared himself King of Jordan, welcomed displaced Palestinians to solidify his claim to the West Bank as part of Jordan and to retain control of Jerusalem.