In 1559, the Kingdom of France ended its ambitions over the Imperial fiefs in Italy, abandoning its claims to Savoy and Milan and withdrawing from Tuscany and Genoese Corsica by the terms of the peace of Cateau-Cambrésis, and a special section of the Imperial Aulic Council in Vienna was established to deal with Italian affairs and legal appeals coming from the peninsula. The major imperial fiefs in Italy were known as "Feuda latina", whereas the smaller ones were known as "Feuda Minora". Italian princes sometimes took part in Imperial diets and their forces also joined the Imperial army, as in the case of the Hungarian campaign of Maximilian II, Holy Roman Emperor against Suleyman the Magnificent in 1566. Imperial authority was used by the Austrian Habsburgs to intervene in Italy during the War of Mantuan Succession phase of the Thirty Years' War and to take control of vacant Italian imperial fiefs during the European Wars of Succession of the 18th century: following the extinction of the Spanish Habsburgs in 1700, the Emperor proclaimed Milan a vacant Imperial fief and added it to his direct Austrian dominions in 1707 (confirmed by the Treaty of Rastatt at the end of the War of the Spanish succession); the Gonzaga of Mantua were deposed at the Diet of Regensburg in 1708 on charges of felony towards the Holy Roman Emperor and their state incorporated into Austrian Milan; following the extinction of the Florentine House of Medici in 1737, Francis I of Habsburg-Lorraine was invested with the Granduchy of Tuscany by Imperial diploma; a similar use of Imperial rights allowed the Habsburgs to establish dynastic branches in Parma and Modena.