The Battle of Takusa was fought on April 12, 1853, between the forces of Kassa Hailu, future Emperor of Ethiopia, and an alliance of several rival provinces. The forces of Hailu's enemies were led by Dejazmach Biru. Hailu's forces won the battle, and Biru was killed. April 12 is the 102nd day of the year in the Gregorian calendar (103rd in leap years). ... 1853 was a common year starting on Saturday (see link for calendar). ... Casus belli is a Latin expression from the international law theory of Jus ad bellum. ... Tewodros II (also known as Theodore II) (born Kassa Hailu) (1818-1868) was an emperor of Ethiopia. ... Map of Ethiopia highlighting the Tigray region. ... Wollo was a province in the north-eastern part of Ethiopia, with its capital city at Dessye. ... Gojjam, or Gojam, was a province in the north-eastern part of Ethiopia, with its capital city at Debra Markos. ... April 12 is the 102nd day of the year in the Gregorian calendar (103rd in leap years). ... 1853 was a common year starting on Saturday (see link for calendar). ... Tewodros II (also known as Theodore II) (born Kassa Hailu) (1818-1868) was an emperor of Ethiopia. ...