1580s in the Holy Roman Empire

The Cologne War (German: Kölner Krieg, Kölnischer Krieg, Truchsessischer Krieg; 1583–1588) was a conflict between Protestant and Catholic factions that devastated the Electorate of Cologne, a historical ecclesiastical principality of the Holy Roman Empire, within present-day North Rhine-Westphalia, in Germany. The war occurred within the context of the Protestant Reformation in Germany and the subsequent Counter-Reformation, and concurrently with the Dutch Revolt and the French Wars of Religion.