Proper noun
Dervish state
(historical) The Dhulbahante anti-colonial state established by the xarunta (haroun) that existed between 1895 C.E. and 1920 C.E. geographically corresponding with modern-day Khaatumo; the successor state to the treatyless Dhulbahante garadship founded in Dareema Caddo.
Muhammad Abdullah Hassan's Dervish State successfully repulsed the British Empire four times and forced it to retreat to the coastal region. Source: Internet