For 10 points, what member of the House of Vasa and a hero of the Thirty Year's War was a "Great" king of Sweden?
This ruler secured funding for his military campaigns from France in the Treaty of Bärwalde. He earlier gained Livonia in the Truce of Altmark, which he forced upon his cousin Sigismund III. This leader famously used mobile and rapid-firing artilleries to defeat Count Tilly at (*) Breitenfeld. When this leader was killed at the Battle of Lützen fighting against Wallenstein, he was succeeded by his daughter Christina. For 10 points, what member of the House of Vasa and a hero of the Thirty Year's War was a "Great" king of Sweden?
This ruler secured funding for his military campaigns from France in the Treaty of Bärwalde.
Gustavus II {Adolphus} [or Gustav {Adolf} or {Gustav} the Great]