First Battle of Švitrigaila and Sigismund Kęstutaitis

The first encounter between the forces of Švitrigaila and Sigismund Kęstutaitis took place near Oszmiana, marking the onset of intense conflict in the Lithuanian Civil War. This clash signaled a significant turning point as both factions vied for control over the Grand Duchy of Lithuania. The power struggle was fueled by internal divisions within the ruling elite, with each side attempting to establish their claim to leadership.