サイクス・ピコ協定
After World War I, the British and other Western powers occupied parts of the Ottoman Empire. Plans made with the French in the Sykes–Picot Agreement designated Britain as the mandate power. The British were able to form their own borders to their pleasure to gain an advantage in this region. The British had firm control of Baghdad and Basra and the regions around these cities mostly consisted of Shiite and Sunni Arabs.