The Battle of Derasge was fought on 9 February 1855 between Kassa Hailu's forces and the forces of the warlord Wube Haile Maryam. Kassa won the battle, and two days later crowned Tewodros II of Ethiopia at the church of Derasge Mariam near Mekane Berhan.
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The original article can be found at Battle of Derasge and the edit history here.