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World at War

Thirty Years' War

1618–1648 Europe Status: ended Casualties: ~8 million

The most destructive European war before the 20th century. Germany lost up to a third of its population. The Peace of Westphalia (1648) established the modern nation-state system and the principle of state sovereignty.

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Belligerents

  • Holy Roman Empire (Habsburgs)
  • France
  • Sweden
  • Denmark
  • Protestant German states

Casualties

~8 million

Key events

  • 1618 — Defenestration of Prague
  • 1631 — Sack of Magdeburg (~20,000 civilian dead)
  • 1648 — Peace of Westphalia

Aftermath

Peace of Westphalia (1648) established the modern state system: sovereign equality, non-interference, religious self-determination — foundational principles of international law to this day. France emerged as Europe's dominant power. Germany's fragmentation locked in for ~200 years.

Weapons & matériel

  • Matchlock muskets
  • Pike-and-shot tercio formations
  • Field artillery (Gustavus Adolphus's revolution)
  • Cuirassier cavalry with wheel-lock pistols

Technology

Gustavus Adolphus's lighter mobile artillery and combined-arms doctrine modernized European warfare

Economy

Funded by mercenary captains who taxed conquered territories — Wallenstein commanded a private army of 100,000

Cost

Holy Roman Empire population fell ~25–40% — some German states lost 60%; took a century to recover

Sources

  • Peter H. Wilson, Europe's Tragedy
  • Schiller
  • Pufendorf
From World at War, an interactive atlas by Jairus Pereira. Figures are approximate, drawn from Wikipedia, UCDP, ACLED and academic sources — a design artefact, not an authoritative register. Contact.