total, Švitrigaila and Livonia organized six raids into Lithuania, the last of which resulted in the Battle of Wiłkomierz. Battle Švitrigaila commanded a force of about 11,000 men: Lithuanians and Orthodox Ruthenians from Polotsk, Vitebsk, Smolensk, Kiev, Volhynia, Livonian Knights and their mercenaries, at least 500 Tatars from the Golden Horde, and a few Teutonic Knights. There might have been some Hussites on his side as he enlisted his nephew Sigismund Korybut, a distinguished military leader during the Hussite Wars. Forces of Sigismund Kęstutaitis were probably smaller. His son Michael commanded Lithuanian troops from Samogitia, Podlaskie, Hrodna, Minsk, and Jakub Kobylański was in charge of Polish forces (4,000 troops). Švitrigaila gathered his forces in Vitebsk and marched towards Braslaw where he joined with the Livonian forces on August 20. The plan was to march Trakai and Vilnius. The opponents met about south of Vilkmergė. At first, the armies were separated by Lake Žirnajai and a marshy creek (Žirnaja or Vintara). The armies did not engage each other. After two days, Švitrigaila and Livonian Grand Master Franco Kerskorff decided to change their position and move north towards Vilkmergė. As the army regrouped and was separated by a rivulet, it was attacked by Sigismund Kęstutaitis. Švitrigaila's army was split in half; the first to fall was the flag of Livonian marshal Werner von Nesselrode. In the ensuing panic, Švitrigaila's army was soundly defeated. Švitrigaila managed to escape to Polotsk with about 30 followers. Kerskorff was killed in the battle along with his marshal and several komturs. Korybut was severely wounded and captured. He died a few days later; historians speculate whether he died of the wounds, was drowned, or poisoned. Many others, including Duke Yaroslav, son of Lengvenis, and imperial envoy Sigismund de Rota, were killed. Many knights, including a reserve unit that was late to battle, were taken captive. Others drowned in the Šventoji River. The victors hunted down the survivors for 15 days. Aftermath The battle reduced the power of the Livonian Order as its army was defeated, its Grand Master killed and of its many senior officers killed or taken prisoner. The damage to the Livonian Order caused by the battle is often compared to the consequences that the Battle of Grunwald (1410) had on the Teutonic Knights. The peace treaty was signed on December 31, 1435 in Brześć Kujawski. The Teutonic and Livonian Orders promised not to interfere