+Gustavus Adolphus (1594–1632) was the King of [Sweden](/wiki/sweden) who transformed his nation into a major European power. Known as the "Lion of the North," his military innovations and leadership were pivotal during the [Thirty Years War](/wiki/thirty_years_war), defending the Protestant cause.
+## See also
+- [Protestantism](/wiki/protestantism)
+- [Holy Roman Empire](/wiki/holy_roman_empire)
+- [Military](/wiki/military)
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