(n)Holy Roman Emperor from 1152 to 1190; conceded supremacy to the pope; drowned leading the Third Crusade (1123-1190), Syn.Frederick Barbarossa, Barbarossa
(n)king of Prussia from 1740 to 1786; brought Prussia military prestige by winning the War of the Austrian Succession and the Seven Years' War (1712-1786), Syn.Frederick the Great
(n)an important battle in the American Civil War (1862); the Union Army under A. E. Burnside was defeated by the Confederate Army under Robert E. Lee, Syn.Battle of Fredericksburg