King Cyzicus ruled over the Dolionians, a tribe that inhabited the southern shore of the Propontis. He gave his name to a city of the same name, Cyzicus, his capital. King Cyzicus welcomed the Argonauts on their journey to Colchis; but after their departure, a storm drove them back to the Cyzicene coast at night. With neither the Argonauts nor King Cyzicus recognizing one another, each mistook the other as an enemy, and battle ensued. King Cyzicus was slain. When day broke, the Argonauts realized their tragic mistake, and granted Cyzicus an elaborate burial.