Vlad the Impaler's father died of natural causes.
Vlad II Dracul . Hunyadi invaded Wallachia , forcing Vlad to flee from Târgoviște in late November , where he was killed at a nearby village . Vlad the Impaler . He was the second son of Vlad Dracul , who became the ruler of Wallachia in 1436 . Vlad 's father and eldest brother , Mircea , were murdered after John Hunyadi , Regent-Governor of Hungary , invaded Wallachia in 1447 .