In those days there was no king in Israel: and in those days the tribe of the Danites sought them an inheritance to dwell in; for to that day [their] inheritance had not fallen to them among the tribes of Israel.
We should not be misled by the relatively small number who took part in this first northward excursion, which seems to have numbered about 2,000, including the 600 fighting men, their wives, and families.  Dan was a numerous tribe numbering no less than, "Sixty-four thousand men twenty years of age and upward," according to the census mentioned in  Numbers 26:43.  Therefore, we suppose that this first migration recorded in this chapter was followed by many other Danites who later joined them.