|In September 1634 Protestant forces under the command of Bernahard of Saxe-Weimer were defeated at the battle of Nordligen in Bavaria. The majority of the German princes then abandoned the Protestant coalition leading to the Peace of Prague. This agreement took place between the elector of Saxony and the Holy Roman Emperor. The agreement voided the Edict of Restitutions. That edict had stated that there was only one religion in a country, that of the ruler.
This did not bring about an end to a war, rather the opposite took place. Catholic France, now fearing the increased power of the Habsburgs, allied itself with the Protestants. It invaded Spanish controlled Netherlands and the Thiry Years War was transformed from a religious war to one about power and land.