GUSTAVO II ADOLFO, King of SWEDEN. - Born December 19, 1594 in Stockholm, died November 16, 1632 in Lützen, fighting against Wallenstein's troops in

(courtesy of Fr. G. Löw)
The Peace of Stolbova, which stripped Russia of any outlet to the sea, actually laid the foundations of the King's future foreign policy, securing for Sweden dominance over the Baltic after the victorious war with Poland which, at intervals, lasted for a full nine years, until the Altmark Armistice (1629). The Baltic had by then become a Swedish lake: Poland had in fact recognized G. A.'s possession of Livonia and certain Prussian territories, as well as the right to collect customs duties at the mouth of the Vistula. The course of the Thirty Years' War, which had meanwhile witnessed the defeat of Christian IV and the imperial invasion of the Jutland peninsula, prompted G. A. to intervene in Germany. As early as February 1629, at the meeting of Ulfsbäck (southern Sweden), the King of Sweden had proposed an alliance to Christian IV. Having rejected the offer, G. A. landed in Germany, near Peenemünde, in the summer of 1630. France, which considered it in its interest to weaken the House of Habsburg, granted subsidies to Sweden (Treaty of Bärwölde, January 1631). Crossing the Elbe, G. A. pushed as far as southern Germany, defeating the imperial forces in repeated battles and occupying Mainz, Frankfurt, Augsburg, and Munich.
With G. A., Sweden became a great European power, remaining such until the death of Charles XII. The King's intervention in the Thirty Years' War saved Protestantism from dissolution as a political power, but it is doubtful whether the King was moved to intervene in Germany for the purely ideal motive of defending the Lutheran faith, or rather whether he intended to create a vast Swedish empire on the shores of the Baltic Sea extending to Norway, part of Denmark, Pomerania, Mecklenburg, and the lands on the shores of the Baltic ceded by Russia and Poland, and to assume the title of Emperor of Scandinavia.