The territory of the descendants of Dan was too small for them, so the descendants of Dan went up and fought against Leshem, captured it, defeated it by the sword, took possession of it and lived there, calling Leshem “Dan” after Dan their ancestor.
Dan is the smallest of the tribes. I love how fierce they are. There is also a contrast between them and the Josephites who came to Joshua and kind of wavered about how they would get their possession. Dan took theirs and then took even more to make sure they had enough. That is bold and admirable.