Event: The Thirty Years' War
The Thirty Years' War was a religious war that lasted for thirty years and has gone down in history as one of the bloodiest and most destructive wars of Europe. It begun as a war between the Protestants and Catholics. The war has earned a spot on the list because it is far too important of an event to leave out as the deadliest war in European history. (1 ene 1618 año – 1 ene 1648 año)