 Complete the following phrase:  In the 13th century, Poland was suffering from the attacks of Pagan tribes. In response, Konrad I of Masovia hired an army of unemployed crusaders - the Teutonic Order. After the failure of converting the Old Prussians to Christianity, the Order fell into a series of conflicts with the Polish state. The Teutonic Knights invaded the Polish coastal region of Gdańsk Pomerania with the countrys main port city of Gdańsk, and therefore took the control of the nearly entire southeastern Baltic Sea coast. The Teutonic Knights continued to occupy the region despite papal verdicts. They remained powerful until 1410, when a combined Polish-Lithuanian army was able to win 