The Anglo-Iraqi Treaty was signed due mostly to the strenuous efforts of the people of the former Ottoman provinces, a coalition of both Sunni and Shia Arabs. Major centres of insurgency during what was later called the "
Great Iraqi Revolution" of 1920 included, Baghdad, Najaf, and
Karbala. The insurgency effort in Karbala was inflamed by a
fatwa issued by the grand mujtahid, Imam Shirazi. This
fatwa made the observation that it was contrary to the principles of Islam for the region to be ruled by the British, who did not practice Islam. The
fatwa ordered a
jihad against the British forces of occupation. The Kurds of the northern part of the region also waged war against the British in the years following the signing and ratification of the treaty. They sought separation from newly created Iraq, aiming to establish a separate homeland for themselves. Their efforts at revolt were tempered by the British, in large part due to air-to-ground attacks conducted by the
Royal Air Force, but the aid of other Kurds to defeat the revolt were of significant consequence. ==The Cairo Conference==