Truce of Altmark
…the village of Altmark (Stary Targ), in Poland, by the Polish–Lithuanian Commonwealth and Sweden, with help from Richelieu's envoy Charnacé, ending the Polish–Swedish War (1626–1629), and freeing King Gustavus Adolphus of Sweden to enter the Thirty Years' War. The truce allowed Sweden to retain control of Livonia. Sweden also evacuated…