The Thirty Years’ War in Central Europe began when the Anglican Church was established in Germany and was met with resistance.
Lutheran princes challenged the Holy Roman Emperor, who was Catholic.
Lutheran princes battled Huguenot princes for control of German states.
Calvinists went to Germany to spread their beliefs and establish strict laws.

The Thirty Years' War was primarily fought in Central Europe between 1618 and 1648. Estimates of the total number of military and civilian deaths which resulted range from 4.5 to 8 million, the vast majority from disease or starvation. In some areas of Germany, it has been suggested up to 60% of the population died.[14]

Until 1938, the war was usually presented as a German conflict; this changed when historian CV Wedgwood argued it formed part of a wider, ongoing European struggle, with the Habsburg-Bourbon conflict at its centre.[15] This is now the generally accepted view, with related conflicts such as the 1568–1648 Eighty Years War, the 1635-59 Franco-Spanish War, and the 1629–31 War of the Mantuan Succession.[16]

Explanation:

he supported the seperation of church and state. he also promoted religious tolerance.