Thirty-years-war

The war ended with a series of treaties that fundamentally reshaped the world:

What started as a clash between and Catholic states within the Holy Roman Empire eventually became a "who’s who" of European powers. thirty-years-war

It established the "Westphalian System," the idea that a nation has exclusive rights over its own territory and domestic affairs (including religion). The war ended with a series of treaties

The Thirty Years' War (1618–1648) was one of the most destructive conflicts in European history, evolving from a local religious dispute into a massive struggle for continental power. 1. The Spark: Defenestration of Prague It introduced "total war" tactics where armies lived

Spain and the Holy Roman Empire fought to maintain Catholic dominance and imperial unity.

The war was brutal. It introduced "total war" tactics where armies lived off the land, seizing crops and burning villages.