In February 1369, Vladislav I subdued Vidin[2] and recognised Louis I of Hungary as his overlord, in return for Severin, Amlaș and Făgăraș.

[10] However, he ended up heading a campaign against the Bulgarian Tsardom of Vidin and its ruler Ivan Sratsimir, which suggests that Vladislav I had in the meantime yielded to him.

[11][12] In 1366, Louis granted the Banate of Severin and the district of Fogaras to Vladislav Vlaicu of Wallachia, who had accepted his suzerainty.

[13][14] Tvrtko I of Bosnia also accepted Louis's suzerainty after Hungarian troops assisted him in regaining his throne in early 1367.

[17] Louis marched to the Lower Danube and ordered Nicholas Lackfi, Voivode of Transylvania, to invade Wallachia in the autumn of 1368.