Stream-of-consciousness scenario time.
http://en.wikipedia.org/wiki/T._E._Lawrence#Arab_revolt
http://www.pbs.org/wgbh/pages/frontline/shows/saudi/etc/cron.html
What if T.E. Lawrence didn't die, continued to live in Arabia, went fully native, decided to back the Hashemites against the Saudis during the formation of Saudi Arabia, and ended up fighting Allied forces because of it.
http://en.wikipedia.org/wiki/T._E._Lawrence#Arab_revolt
http://en.wikipedia.org/wiki/Arab_Revolt#1918:_Increased_Allied_assistance_and_the_end_of_fightingDuring the war, Lawrence fought with Arab irregular troops under the command of Emir Faisal, a son of Sherif Hussein of Mecca, in extended guerrilla operations against the armed forces of the Ottoman Empire.
http://en.wikipedia.org/wiki/Saudi_conquest_of_Hejaz#Saudi_campaignThe Hedjaz region of western Arabia became an independent state under Hussein's control, until 1925, when, abandoned and isolated by the British policy–which had shifted support to the al Saud family–it was conquered by Saudi Arabia.
King Hussien o Hejaz fled to Cyprus, declaring his son Ali bin Hussien as the King of Hejaz, but effectively with the fall of the Kingdom the dynasty ended up in an exile. Hashemites however remained to rule the emirate of Transjordan and the Kingdom of Iraq.
http://www.pbs.org/wgbh/pages/frontline/shows/saudi/etc/cron.html
Although Saudi Arabia officially maintained neutrality through most of the war, the U.S. began to court the kingdom as it realized the strategic importance of Saudi oil reserves. In 1943, President Franklin Roosevelt made Saudi Arabia eligible for Lend-Lease assistance by declaring the defense of Saudi Arabia of vital interest to the U.S. In 1945, King Abdel Aziz and President Roosevelt cemented the tacit oil-for-security relationship when they met aboard the USS Quincy in the Suez Canal.
What if T.E. Lawrence didn't die, continued to live in Arabia, went fully native, decided to back the Hashemites against the Saudis during the formation of Saudi Arabia, and ended up fighting Allied forces because of it.