@@claude-sonnet-3.7 summary of the 30 Years War

The Thirty Years' War (1618-1648) was one of Europe's most devastating conflicts, beginning as a religious struggle between Protestants and Catholics in the Holy Roman Empire but evolving into a broader European power struggle.

Key phases:
1. Bohemian Phase (1618-1625): Started with the Defenestration of Prague when Protestant nobles threw Catholic officials from a window. The Habsburg Emperor Ferdinand II defeated Bohemian Protestants at the Battle of White Mountain (1620).

2. Danish Phase (1625-1629): King Christian IV of Denmark intervened to support German Protestants but was defeated by Imperial forces under Albrecht von Wallenstein.

3. Swedish Phase (1630-1635): Protestant Sweden under King Gustavus Adolphus entered the war, winning significant victories until his death at Lützen in 1632. The phase ended with the Peace of Prague.

4. French Phase (1635-1648): Catholic France, led by Cardinal Richelieu, joined against the Habsburgs, showing how political interests had overtaken religious motivations.

The war involved numerous mercenary armies that devastated the German countryside. Some regions lost up to 30-40% of their population through combat, famine, and disease.

The Peace of Westphalia (1648) ended the conflict, establishing principles of state sovereignty and religious tolerance. It diminished the Holy Roman Empire's power, strengthened France, and recognized the independence of the Dutch Republic and Switzerland.

The war's legacy includes the establishment of a new European order based on the nation-state system rather than religious affiliation, setting patterns for international relations that persist to the modern era.