In 1381, Lithuanians commanded by Kaributas, brother of Grand Duke Jogaila, attacked Bayernburg when they learned that it was defended only by a handful of soldiers. The Teutons decided to defended the fortress. Seeing that they were unable to defend the outer bailey, they burned it down themselves. After six days, the Lithuanians retreated as Bayernburg was about to receive reinforcements from Ragnit. The fortress was captured and burned down in July 1384 by Vytautas when he reconciled with his cousin Jogaila at the conclusion of the Lithuanian Civil War (1381–84). Vytautas also burned down Georgenburg and New Marienburg.