Thirty-years-war -

Some regions of Germany lost over 50% of their population .

The war began in Bohemia (modern-day Czech Republic) when Protestant nobles, angry over the curtailing of their religious rights, tossed two Catholic royal officials out of a window in Prague Castle. Remarkably, they survived the 70-foot drop, but the act triggered a rebellion against the Holy Roman Empire. 2. From Religion to Politics thirty-years-war

More people died from typhus and plague—spread by marching armies—than from actual combat. 4. The Turning Point: Gustavus Adolphus Some regions of Germany lost over 50% of their population