In 853 or 854, the Bulgar Army, led by Vladimir, the son of Boris I of Bulgaria, invaded Serbia in an attempt to exact vengeance for the previous defeat. The Serbian Army was led by Mutimir and his brothers, which defeated the Bulgars, capturing Vladimir and 12 boyars. Boris I and Mutimir agreed to cease hostilities (and perhaps an alliance), and Mutimir sent his sons Bran and Stefan to the border to escort the prisoners, where they exchanged items as a sign of peace. Boris gave them "rich gifts", while he was given "two slaves, two falcons, two dogs, and 80 furs".