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

On June 28, the Livonian Order received reinforcements from the Teutonic Knights and defeated residents of Riga and Lithuanians near Neuermühlen. According to inflated numbers reported by Peter von Dusburg, some 4,000 Rigans and Lithuanians died at Neuermühlen. The knights proceeded to besiege and capture Riga. After Eric VI of Denmark threatened to invade Livonia to assist Archbishop Johannes III, a truce was reached and the conflict was mediated by Pope Boniface VII. However, the conflict was not resolved and the alliance between Lithuania and Riga continued for another fifteen years.