Cuius Regio: The Thirty Years War is published by GMT Games and designed by Francisco Gradaille, with Mike Sigler as developer. The title comes from the formula agreed at the Peace of Augsburg in 1555 – cuius regio, eius religio, whose realm, their religion – and that single phrase carries the whole religious fuse of the conflict. The game opens with the Defenestration of Prague in May 1618 and takes the players through thirty years of warfare that reshaped Central Europe, treating the war at the operational level where it was actually decided: not in a handful of famous battles, but in the endless marching, the sieges, the contributions squeezed out of occupied territory, and the mercenary armies that had to keep moving in order to feed themselves.

Two players take the Catholic and the Protestant side across scenarios covering the Bohemian Revolt, the Danish intervention, the Swedish intervention under Gustavus Adolphus, and the French intervention, plus a full campaign of 31 turns running from 1618 to 1648. Each turn is a year and each hex covers roughly nine miles of ground, so the scale is generous and the decisions are operational rather than tactical. Armies can act several times in a turn, but every activation piles on fatigue and makes them progressively less effective, which is a very elegant way of modeling the exhaustion of period campaigning. Combat uses one integrated system for both field battles and sieges, resolved on a simple Battle Results Table modified by leadership, army composition, and condition. What I like most here is the range: a short scenario fits into an evening, while the grand campaign is a genuine multi-session project.

I have to admit I have a real soft spot for Paco Gradaille’s designs. His Plantagenet: Cousins’ War for England, 1459-1485 is one of the entries in the Levy & Campaign series I keep coming back to, and Habemus Papam showed how well he handles the political and religious side of history. Cuius Regio sits somewhere between those two instincts, and that is exactly why I was so curious about this box.

Below I am presenting the game components, giving also a quick overview of the rules and key design features:

Enjoy the material!