As im sure most of us know, after the Arab revolt in World War 1, which was a Hashemite lead effort, Feisal al-Hashemi tried to build up support amongst the British in paticular for a Arab state encompassing the Arab lands of the former Ottoman empire. However, the British decided that allowing their French allies to have their spoils of war was more important then rewarding Feisal's efforts during the war. The French occupied Syria and defeated Fesial when he tried to resist militarily.
So the challenge is, to give Feisal control of the Levent by 1930, with any POD from January 1st 1915. Bonus points if this Greater Syrian state has Mesopotamia and is not subordinate to Britain in some way (such as Mandate, ect).