Analysis of information sources in references of the Wikipedia article "Mahmud Barzanji revolts" in English language version.
Sheikh Mahmoud eventually made his final submission to the British in 1927, but in 1930-by which time Iraq had become an independent state he once again. tried to establish himself as ruler of an independent Kurdistan.The Iraqi army moved against him and defeated him, and Mahmoud at last went into exile for good
In summer 1919, this state was disposed of, after the British suppressed a Kurdish rebellion.