and possibly Oltenia, where they mingled with the indigenous population of Thracian origins. When the Agathyrsi were later completely assimilated by the Geto-Thracian populations;, their fortified settlements became the centres of the Getic groups who would later transform into the Dacian culture; an important part of the Dacian people descended from the Agathyrsi. When the La Tène Celts arrived in the 4th century BC, the Dacians were under the influence of the Scythians.