military operation
...that the military operation against the dervish forces of Mohammed Abdullah Hassan, commonly known as the "Mad Mullah", was described by a British politician as "the cheapest war in history"?
...that the <b id="mwCls"><a class="mw-redirect" href="./1920_conflict_between_British_forces_and_Somaliland_dervishes" id="mwClw" rel="mw:WikiLink" title="1920 conflict between British forces and Somaliland dervishes">military operation</a></b> against the <a href="./Dervish" id="mwCl0" rel="mw:WikiLink" title="Dervish">dervish</a> forces of <a href="./Mohammed_Abdullah_Hassan" id="mwCl4" rel="mw:WikiLink" title="Mohammed Abdullah Hassan">Mohammed Abdullah Hassan</a>, commonly known as the "Mad Mullah", was described by a British politician as "the cheapest war in history"?