Judges 18:1

In those days there was no king in Israel, this fact being noted here again to explain the behavior of the Danites and to register the author's disapproval of their action; and in those days the tribe of the Danites sought them an inheritance to dwell in; for unto that day all their inheritance had not fallen unto them among the tribes of Israel. Dan had indeed been given an allotment, in Northern Philistia, in the foothills and in the plain along the Mediterranean, Joshua 19:40, but their territory had been insufficient for their needs from the beginning, chiefly because they could not summon the necessary courage and warlike valor to force out the heathen inhabitants of that country.