remaining Greek states fell in 1461 (Despotate of the Morea and Empire of Trebizond) (see: Ottoman Greece). Bulgarian Empire In the latter half of the 14th century, the Ottoman Empire proceeded to advance north and west in the Balkans, completely subordinating Thrace and much of Macedonia after the Battle of Maritsa in 1371. Sofia fell in 1382, followed by the capital of the Second Bulgarian Empire Tarnovgrad in 1393, and the northwest remnants of the state after the Battle of Nicopolis in 1396. Serbian Empire A significant opponent of the Ottomans, the young Serbian Empire, was worn down by a series of campaigns, notably in the Battle of Kosovo in 1389, in which the leaders of both armies were killed, and which gained a central role in Serbian folklore as an epic battle and as the beginning of the end for medieval Serbia. Much of Serbia fell to the Ottomans by 1459, the Kingdom of Hungary made a partial reconquest in 1480, but it fell again by 1499. Territories of Serbian Empire were divided between Ottoman Empire, the Republic of Venice and the Kingdom of Hungary, with remaining territories being in some sort of a vassal status towards Hungary, until its own conquest. Crusades against the Ottoman Empire The papacy regularly offered crusade privileges from the 1360s generating no significant military response against Muslims in the Mediterranean. The first revival of activity was a 1390 Genoese plan to seize the Tunisian port of Al-Mahdiya. Both the Roman and Avignon popes awarded indulgences and the French king's uncle, Louis II, Duke of Bourbon, was the leader. There is little evidence of cross taking, and the exercise was more of a chivalric promenade by a small force. After a disease-ridden, nine-week siege, the Tunis crusade agreed to withdraw. After their victory at the Battle of Kosovo in 1389, the Ottomans had conquered most of the Balkans and had reduced Byzantine influence to the area immediately surrounding Constantinople, which they later besieged. In 1393, the Bulgarian Tsar Ivan Shishman lost Nicopolis to the Ottomans. In 1394, Pope Boniface IX proclaimed a new Crusade against the Turks, although the Western Schism had split the papacy. Sigismund of Luxemburg, King of Hungary, led this Crusade which involved several French nobles including John the Fearless, the son of the Duke of Burgundy, who became the Crusade's military leader. Sigismund advised the Crusaders to focus on defence