The Thirty Years’ War ended with which treaty?

The Treaty of Westphalia (1648) concluded the Thirty Years’ War (1618–1648); a major European conflict over religion and politics. It established state sovereignty; shaping modern diplomacy. The Paris Treaty and Versailles relate to other events; and ‘Press Wick’ is fictional. The correct answer; D) Treaty of Westphalia; is crucial for understanding international relations history; a common exam topic.