According to ancient sources, Bardylis lived to over 90 years. According to these sources, Bardylis lived a long time and was at an advanced age when he faced Philip II of Macedon in 358 BC and at whose hands he died[4] after Philip rejected his offer of peace based on Bardylis retaining conquered lands.[5] Grabus became the most powerful Illyrian king after Bardylis's death.