Rubuta ci gaba ga wannan sakin layi - Birtaniya sun kama Baghdad a watan Maris na 1917. A cikin 1918 an haɗa shi da Mosul da Basra a cikin sabuwar ƙasar Iraki ta amfani da Mandate na League of Nations. Kwararru daga Indiya sun tsara sabon tsarin, wanda ya fifita mulkin kai tsaye ta hannun wadanda aka nada a Burtaniya, kuma ya nuna rashin amincewa da kwarewar Larabawa na gida don cin gashin kansu. An watsar da tsoffin dokokin Ottoman kuma an maye gurbinsu da sabbin ka'idoji don dokar farar hula da ta laifi, bisa ga al'adar Indiya. Rupee na Indiya ya zama kudin. Sojoji da 'yan sanda sun kasance' yan Indiyawan da suka tabbatar da amincinsu ga British Raj. Babban tawayen Iraqi na 1920
An murkushe shi a lokacin rani na 1920 amma ya kasance babban abin motsawa ga kishin kasa na Larabawa. An ba Kamfanin Man Fetur na Turkiyya ikon mallakar bincike da samarwa a 1925. An fara gano mahimman man fetur a 1927; An canza sunan zuwa Kamfanin Man Fetur na Iraki (IPC) a 1929. Ya kasance mallakar ƙungiyar kamfanonin man fetur na Burtaniya, Faransa, Holland da Amurka, kuma Birtaniyya ce ke sarrafa ta har sai da aka sanya ta ƙasa a shekarar 1972. Biritaniya ta yi mulki a ƙarƙashin umurnin League daga 1918 zuwa 1933. An ba da 'yancin kai a hukumance a shekara ta 1933, amma tare da kasancewar Burtaniya mai ƙarfi a bango.