“After him came Shamgar son of Anath, who killed six hundred of the Philistines with an ox-goad. He too delivered Israel.”
There is not much written about this judge, whose name means stranger, except that he killed 600 Philistines. This is the first mention of the Philistines as a problem. In fact, there is no mention of the Spirit of Yahweh coming upon him or how long there was peace. Shamgar is judge #3.