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Chaplain of the army of the Holy Roman Empire in 1601. Rallied the German princes to fight a superior Turkish force, and was asked to lead the army into battle at Stuhlweissenburg (modern Albe-Royal) carrying no weapon but a crucifix; the Turks were completely defeated. Master general of his order from1602 to 1605; he was the choice for another term, but turned it down. Carried out important and successful diplomatic peace missions to Munich and Madrid. Assigned in 1605 to evangelize in Germany, where he had great success. Convinced Philip III of Spain to join the German Catholic League. Commissary general of his order for the provinces of Tyrol and Bavaria. Spiritual director of the Bavarian army. Tended to fall into ecstasies when celebrating Mass.
In 1956, the Capuchin Order compiled fifteen volumes of his sermons, letters and writings. Proclaimed Apostolic Doctor of the Church by Pope John XXIIIin 1959.