Thirty Years' War: A devastating war fought primarily within Europe from 1618 to1648 that involved many European powers and resulted in significant political and religious changes. (One-sentence definition)
Scientific Revolution: A period of intellectual revolution during the late Renaissance where new scientific ideas emerged, challenging traditional beliefs. (One-sentence definition)
Peace of Westphalia: A series of treaties signed in 1648 that ended the Thirty Years' War and established principles for international relations among European nations. (One-sentence definition)