 of the Dagu forts and ambushed Edward Seymour's men, who took refuge in an abandoned fort.  
Alfred Gaselee led the expedition that ended this conflict. In its early days, one side lost control   of the Dagu forts and ambushed Edward Seymour's men, who took refuge in an abandoned fort.  Claude MacDonald led one side's defense of the Tartar Wall during this conflict, in which Clemens   von Ketteler was murdered and skinned by a group of Muslims called the Kansu Braves, who also  torched the Hanlin Academy. This conflict pitted the Eight-Nation Alliance against forces backed by  the Empress Dowager Cixi [TSEE-shee], including the Righteous Harmony Society. Name this 1899  to 1901 revolt that failed to expel foreigners from China.
Alfred Gaselee led the expedition that ended this conflict. In its early days, one side lost control  
Boxer Rebellion [accept answers mentioning the Society of Righteous and Harmonious  Fists or Righteous Harmony Society before “Righteous Harmony”; accept Yihetuan or  Ihot’uan or I Ho Chuan; accept synonyms for “Rebellion”]