Celibacy is practiced by Haydariya Sufi dervishes. Under Ottoman rule it became a tekke and was used by whirling dervishes. The Mevlevi Order is better known in the West as the "whirling dervishes". Examples include sadhus, dervishes, Bhikkhus and the sramanic traditions generally. They follow the mystical rituals of the wandering dervishes. The tabarzin is sometimes carried as a symbolic weapon by wandering dervishes (Muslim ascetic worshippers). The "tabarzin" was sometimes carried as a symbolic weapon by wandering dervishes (Muslim ascetic worshippers). The dervishes then remove their black cloaks. The kitchen was also used for educating the dervishes, teaching them the Sema. Also, there were the quazi-religious fraternities called "futuvva", which were run by local dervishes. Another famous monastery of its time was that of the "halveti" dervishes. Repeated military expeditions were unsuccessfully launched against Hassan and his Dervishes before World War I. Bektashi "tekkes" were closed and their dervishes were exiled. The Ethiopian army retreated giving the Dervishes their first success. Ali returned and attempted to destroy the power of the dervishes completely.