sentences:  In 1519, fulfilling their duties as Polish vassals, Stanisław and Janusz III intervened in the Polish-Teutonic War, sending auxiliary troops to the Polish King, and in the winter of 1519-1520 they personally captured several towns in Masuria.At the same time, Stanisław secretly entered into talks with the Teutonic Knights for a ceasefire, which finally took place in December 1520, a few months before a peace treaty ended the war between Poland and the Teutonic Order.In their private lives, both Stanisław and his brother were heavily inclined to drink and women; however, in order to continue his bloodline, in 1523 Stanisław started negotiations for marriage with Princess Hedwig of Poland, only surviving daughter of King Sigismund I and his first wife, Barbara Zápolya.