Ulrich von Jungingen

Ulrich von Jungingen was the Grand Master of the Teutonic Knights during the early 15th century. He is most notable for commanding the Teutonic forces at the Battle of Tannenberg in 1410, where his army was decisively defeated by the combined forces of Poland and Lithuania. This defeat marked a significant turning point in the power dynamics of Eastern Europe, leading to the decline of Teutonic influence in the region.