Louis ya tara sojojinsa a Temesvár (yanzu Timișoara a Romania ) a watan Fabrairu na shekara ta 1365. Bisa ga yarjejeniyar sarauta a wannan shekarar, yana shirin kai wa Wallachia hari domin sabon Voivode, Vladislav Vlaicu, ya ƙi ya yi masa biyayya.Koyaya, ya ƙare ya jagoranci yaƙin neman zaɓe a kan Tsardom na Bulgarian na Vidin da mai mulkinsa Ivan Sratsimir, wanda ke nuni da cewa Vladislav Vlacu a halin yanzu ya yarda da shi.Louis ya kama Vidin kuma ya daure Ivan Stratsimir a watan Mayu ko Yuni.A cikin watanni uku, sojojinsa sun mamaye daular Ivan Stratsimir, wanda aka tsara zuwa wani lardin iyaka na daban, ko banate, ƙarƙashin umarnin sarakunan Hungary.