Inspired by the roots of Arab unity

"The desire for a unified independent Arab state prompted Arab leaders to join the Allies in the first world war after the negotiations of Sir Henry Mac Mahon with the late Sayyid Hussein bin Ali, the Sharif of Mecca.
Unfortunately, the Allies had different plans. Contrary to the assurances given to Hussein by the British, the Arab lands were divided between France and the UK."
Al Jazeera