himself and his younger brother, Henry the Friendly. Aftermath Though Louis had prevailed, his royal title remained contested, especially by Pope John XXII and Frederick's brother Leopold, who remained a fierce opponent. After three years Louis had to release Frederick from captivity and reconcile with him, even offering him a joint rule and the Rex Romanorum title in return for his support to receive the Imperial crown. Neither the House of Wittelsbach nor the Habsburgs were able to defend their claims to the royal title, which after Louis' death in 1347 again passed to Charles IV from the House of Luxembourg. See also Battle of Gammelsdorf Notes Sources Delbrück, Hans, trans. Walter Renfroe Jr. History of the Art of War, Volume III: Medieval Warfare (Lincoln, NE: University of Nebraska Press, 1982) Muhldorf 1322 Muhldorf 1322 14th century in Austria 1320s in the Holy Roman Empire 1322 in Europe Conflicts in 1322 Louis IV, Holy Roman Emperor