Invasion of Wallachia
Wallachia, RomaniaLouis invaded Wallachia in May 1375, because the new prince of Wallachia, Radu I, had formed an alliance with the Bulgarian ruler, Ivan Shishman, and the Ottoman Sultan Murad I. The Hungarian army routed the united forces of the Wallachians and their allies, and Louis occupied the Banate of Severin, but Radu I did not yield. During the summer, Wallachian troops stormed into Transylvania and Ottomans pillaged the Banat.