How did WWI lead to the creation of Israel?

During World War I, the British wooed the Zionists in order to secure strategic control over Palestine and to gain the support of world Jewry for the Allied cause. The Balfour Declaration of 1917 contained a letter from Foreign Secretary Arthur J. Balfour to a British Zionist leader, which approved the establishment in Palestine of a "national home for the Jewish people." As Palestine had ped from Turkish to British control, this provided the Zionists with the charter they had been seeking.