The Battle of Zawichost (1205) was fought between Roman the Great of Galicia-Volhynia and Leszek I the White of Lesser Poland, along with his brother, Konrad I of Masovia. After declaring war and invading Lesser Poland, Roman and his forces (druzhina) were ambushed by the Poles in the vicinity of Zawichost by the Vistula (Visla) River. In the tumult that followed, Roman was killed and the Polish victory would lead to Poland's growing power and the weakening of Rus'.

Roman Mstislavich, also known as Roman the Great, was Prince of Novgorod (1168–1170), Volhynia, and Galicia. He founded the Romanovichi branch of Rurikids, which would rule Galicia–Volhynia until 1340.