The Livonian Order is defeated in the Battle of Aizkraukle by the Grand Duchy of Lithuania.

The Livonian Order was an autonomous branch of the Teutonic Order, formed in 1237. From 1435 to 1561 it was a member of the Livonian Confederation.

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.

The Grand Duchy of Lithuania was a sovereign state in northeastern Europe that existed from the 13th century, succeeding the Kingdom of Lithuania, to the late 18th century, when the territory was suppressed during the 1795 partitions of Poland–Lithuania. The state was founded by Lithuanians, who were at the time a polytheistic nation of several united Baltic tribes from Aukštaitija. By 1440 the grand duchy had become the largest European state, controlling an area from the Baltic Sea in the north to the Black Sea in the south.