Residents of Riga and the Grand Duchy of Lithuania defeat the Livonian Order in the Battle of Turaida.

Riga is the capital, primate, and largest city of Latvia. Home to 591,882 inhabitants, the city accounts for a third of Latvia's total population. The population of Riga metropolitan area, which stretches beyond the city limits, is estimated at 847,162. The city lies on the Gulf of Riga at the mouth of the Daugava river where it meets the Baltic Sea. Riga's territory covers 307.17 km² (118.60 sq mi) and lies 1–10 m (3–33 ft) above sea level on a flat and sandy plain.

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.

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 Turaida or Treiden was fought on June 1, 1298, on the banks of the Gauja River near the Turaida Castle. The Livonian Order was decisively defeated by the residents of Riga allied with the Grand Duchy of Lithuania under command of Vytenis.

June 1 is the 152nd day of the year in the Gregorian calendar; 213 days remain until the end of the year.