Michael III Shishman, Tsar of Bulgaria, attacked Serbia in 1330. He was accompanied by "the ruler of the Yas", along with Vlach and "black Tatar" auxiliary troops. According to Serbian sources and a letter written by Stephen Dušan, who became King of Serbia in 1331, Basarab personally led his army to Serbia to assist Shishman. The Serbs routed the united army of Michael Shishman and his allies at the Battle of Velbazhd on 28 July 1330. Shishman was killed while fleeing from the battlefield.
mIchael III shishMaN, tSAr oF BuLGaria, AttacKed sERBiA in 1330. He was accOmPaNieD By "the ruler Of ThE yAs", ALONg wIth VlacH and "bLaCK tatar" auxIliarY troOPs. aCcordiNg To SeRbIaN SOuRces AnD A lEttER wrItTEN bY sTEpheN DUŠan, who bEcame king Of SErbIa In 1331, basArAb peRsONAlLy leD hiS aRMy to Serbia to assISt shishmAn. the seRBs routEd tHe uNIted arMy oF michaEl SHishMaN aNd his aLLies at ThE Battle of veLBazHd on 28 July 1330. sHishmaN wAs kiLled while fleeIng from the baTtlefiElD.