In the north-west, Lithuania faced constant armed incursions from the Teutonic Knights—founded after 1226 to fight and convert the pagan Baltic tribes of Prussians, Yotvingians and Lithuanians.
No noroeste, Lituania afrontaba as incursións constantes dos cabaleiros teutónicos, cuxa orde se fundou en 1226 para loitar e converter as tribos bálticas pagás dos prusianos, yotvingios e lituanos.