King Jagiello and Lithuanian Grand Duke Vytautas the Great (Witold) had difficulty in reconciling with the occupation of their lands, the massacres of innocent citizens in villages near the Polish-Lithuanian-Teutonic borders. They were also conscious that the Order was gaining power year by year, preparing to conquer Eastern Europe.
There was peace for a time after the union of Lithuania and Poland, but in 1398 the Teutonic knights invaded Lithuanian and Polish territory, and occupied the areas of Zemaitija (Zmudzi), Santok, and Drezdenko. A cold war started between the Polish-Lithuanian State and the Teutonic Order.
The Poles and Lithuanians realized they were not strong enough to oppose the terror which the knights visited on the far fringes of their land, and had to bear the invasions and insults in silence.
