how to be "proper Muslims". There were 52 hujar (plural of hijra) by 1920 and 120 by 1929. Ikhwan were known for wearing white turbans rather than the traditional Arab Kufiya (roped headcloth), and for covering their faces when they encountered Europeans or Arabs from outside Saudi Arabia. The pacification of the tribesmen was not entirely a success, and the former nomads continued their raids, which now had religious sanction and were bloodier than before. Unlike nomadic raiders, the Ikhwan earned "notoriety for routinely killing male captives" and for sometimes putting "children and women to death". From 1914 to 1926 Ibn Saud and Wahhabi religious leadership allied with him urged the Ikhwan to not attack or harass other nomads and townspeople of the Najd. From 1926 and 1930, the conflict was more serious, and effectively a rebellion and attempt to overthrow Ibn Saud by a minority of the Ikhwan leaders. With the conquest of the Hejaz in 1925, Ibn Saud had completed his territorial expansion and negotiated border agreements with his neighbors, the British protectorates of Transjordan, Iraq and Kuwait. Some Ikhwan leaders wanted to continue the expansion of the Wahhabi realm into these states, and launched raids into them. This left Ibn Saud responsible for military attacks originating in his country and facing British military power if he did not stop them. Differences with Ibn Saud In general the Ikhwan wished Ibn Saud to pursue strict Wahhabi policies, while Ibn Saud sought more flexibility to adapt "policy to local circumstances" and maintain political stability, especially in newly conquered lands that had few wahhabi believers. Wahhabis supported forced conversion of Shia in al-Hasa, while Ibn Saud was willing to tolerate their practices. After conquest of the two holy cities of Mecca and Medina—which had been part of the Ottoman Empire for four centuries and developed a pluralistic religious culture—Ibn Saud sought to "reassured the Muslim world that a new Saudi regime would not disrupt the pilgrimage", while the Ikhwan "pressed for strict adherence to norms" such as forbidding smoking tobacco and worshiping at shrines. In 1926 meeting of Ikhwan leaders at al-Artawiya, found Ibn Saud at fault for "not upholding the sharp separation of belief and infidelity". Among his misdeeds were allowing two of his sons to travel to "idolatrous lands" (Faisal to England and Saud to Egypt); allowing (what they believed to be) idolatrous nomads from Iraq and Transjordan