 These shipping tolls financed Sweden's involvement in the Thirty Years' War.The Truce of Altmark was signed shortly after Sweden was defeated by Poland led by Field Crown Hetman Stanisław Koniecpolski and Holy Roman Imperial troops at Trzciana, at which King Gustavus Adolphus of Sweden narrowly escaped capture.Gustavus was wounded several times and at one point was saved by one of his men.