 Mikołaj Sienicki, a Protestant activist, was a parliamentary leader of the execution movement and one of the organizers of the Warsaw Confederation.Despite the favorable economic development, the military potential of 16th century Poland was modest in relation to the challenges and threats coming from several directions, which included the Ottoman Empire, the Teutonic state, the Habsburgs, and Muscovy.Given the declining military value and willingness of pospolite ruszenie, the bulk of the forces available consisted of professional and mercenary soldiers.