The Thirty Years' War was one of the longest and most destructive conflicts, as well as the deadliest European religious war, in history. It took place in Central Europe between 1618 and 1648 and resulted in eight million casualties.

Initially a war between various Protestant and Catholic states in the fragmented Holy Roman Empire, it gradually developed into a more general conflict involving most of the great powers. These states employed relatively large mercenary armies, and the war became less about religion and more of a continuation of the France–Habsburg rivalry for European political pre-eminence.

The war was preceded by the election of the new Holy Roman Emperor, Ferdinand II, who tried to impose religious uniformity on his domains, forcing Roman Catholicism on its peoples. The northern Protestant states, angered by the violation of their rights to choose that had been granted in the Peace of Augsburg, banded together to form the Protestant Union. Ferdinand II was a devout Roman Catholic and relatively intolerant when compared to his predecessor, Rudolf II, who ruled from the largely Protestant city of Prague. Ferdinand's policies were considered strongly pro-Catholic.... More • http://en.wikipedia. ... Years'_War View • Books • Images • Videos • Search Related • Wars • Austria • Denmark • Enlightenment • Europe • France • Germany • Reformation • Renaissance • Sweden • War • All Events