 Before this, Dracula and Báthory had waged war in Bosnia, where Báthory was sent by Corvinus to free a certain Bosnian king whose name was also Matthias.The new campaign would involve Hungarian, Moldavian, and Wallachian troops, with the assistance of a small Serbian contingent.Dracula wrote to his cousin, Prince Stephen III of Moldavia, to wait for him so that the two could merge their armies, but the merging failed due to delayment in movement of the Hungarian troops, which resulted in Stephen's defeat at the Battle of Valea Albă on July 26, 1476.