Apparently, of the castle's defense force of 400, only 36 survived. Questions remain with regard to the castle's defenders' lack of support from outside during the siege. In any event, Kęstutis soon regained and rebuilt Kaunas Castle, but it remained a point of contention between Lithuanians and Teutonic Knights for many years. In 1384 Kaunas Castle was re-captured by the Teutonic Knights. At this time Grand Master Konrad Zöllner von Rotenstein began reconstruction of Kaunas Castle and renamed it Marienwerder. The presence of the Knights in Kaunas meant that the entire defensive system of castles along the Nemunas was threatened. Confronting this situation, the Lithuanians launched an attack on the castle later the same year.