The Battle of Aizkraukle or Ascheraden was fought on 5 March 1279 between the Grand Duchy of Lithuania, led by Traidenis, and the Livonian branch of the Teutonic Order near Aizkraukle in present-day Latvia. The order suffered a great defeat: 71 knights, including the grand master, Ernst von Rassburg, and Eilart Hoberg, leader of the knights from Danish Estonia, were killed. It was the second-largest defeat of the order in the 13th century. After the battle Duke Nameisis of the Semigallians recognized Traidenis as his suzerain.