Cuius Regio

Cuius Regio: The Thirty Years War is a two-player operational-strategic wargame covering the entire Thirty Years' War (1618-1648), one of the defining conflicts in European history. Designed by Francisco Gradaille and published by GMT Games, players command the Imperial and Protestant forces while guiding the intervention of the major European powers that shaped the conflict.

The game includes scenarios covering all four historical phases of the war:

• The Bohemian Revolt
• The Danish Intervention
• The Swedish Intervention
• The French Intervention

A full 31-turn campaign recreates the complete conflict from the Defenestration of Prague to the Peace of Westphalia.

Gameplay

Designed on an operational-strategic scale, each turn represents one year.

Players will:

• recruit and sustain their armies;
• conduct military operations;
• besiege key fortresses;
• command famous historical leaders;
• employ artillery trains during battles and sieges;
• balance diplomacy, logistics and military exhaustion.

One of the game's defining mechanics is operational fatigue. Armies may perform several operations during a turn, but each additional operation reduces their effectiveness, forcing players to carefully manage tempo and resources.

Highlights

• Complete strategic treatment of the Thirty Years' War.
• High operational freedom.
• Integrated campaign, siege and battle system.
• Historical commanders with individual leadership ratings.
• Historical scenarios lasting 1–6 hours.
• Epic 31-turn campaign lasting 30–40 hours.

Box Contents

• One 34" × 33" mounted map
• Four countersheets
• Two player screens
• Two force mats
• Four player aid cards
• Rulebook
• Scenario book
• Two dice

Game Information

• Publisher: GMT Games
• Designer: Francisco Gradaille
• Developer: Mike Sigler
• Players: 2
• Age: 14+
• Playing Time: 1–6 hours (scenarios), 30–40 hours (campaign)
• Language: English
• Published: 2026