Actually, these savage fellows are only accurate for the period through the 1880's or thereabouts. The Ottomans tired of the bashi-bazouks' antics after the debacle in the Balkans plus the Egyptians' bad experiences with them in the Sudan in the 1880's and they disappeared by 1890 or so. What replaced them in Eastern Turkey wasn't much better - it were the Hamidiye units of irregular Kurdish or Turkmen cavalry, uniformed in either civilian dress or Caucasian-style beshmet coats and fur papakha caps. They had modern rifles and, in World War I, machine guns, that were mostly used to massacre Armenians, Anatolian Greeks and Assyrians - both the handfuls of rebels or insurgents and the much greater numbers of civilians.