The designation "Earth-TRN566" used in this article is unofficial , used by this wiki for internal purposes only until an official designation is provided by Marvel. (For more information on TRNs, go to this page).
Abraham Kieros was a Mutant who visited Dr. Adler to become Human. However, Apocalypse had Mystique disguise herself as the doctor to trick Warren Worthington III, Abraham, Autumn Rolfson and Plague into undergoing a procedure which instead further mutated them. Abraham became the Horseman of War and he had them attack Europe with War attacking a military base outside of Berlin, Germany. The Horsemen were brought to Stonehenge and confronted the X-Men. War was captured by Jean Grey and was brought with Apocalypse when he fled.[1]
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