By then he had already served for four years as the regent of Queen Christina.
He was the man who organized the League of Heilbronn, a mutual-assistance organization for the Protestant princes of Germany. His final achievement was the orchestration of the Peace of Bromsebro, by the terms of which his country gained hegemony over one of its bitter rivals. After being appointed legate plenipotentiary to Germany, he negotiated the Treaty of Wismar with France and represented his country at Westphalia. By then he had already served for four years as the regent of Queen Christina. FTP, name this powerful Swedish statesman and key figure in the Thirty Years' War.
He was the man who organized the League of Heilbronn, a mutual-assistance organization for the Protestant princes of Germany.
Axel {Oxenstiberna}