Albert Barnes Commentary Judges 6:33

"Then all the Midianites and the Amalekites and the children of the east assembled themselves together; and they passed over, and encamped in the valley of Jezreel." — Judges 6:33 (ASV)

A fresh invasion, and the last, of Midianites, Amalekites, and Arabs . But the Israelites, instead of hiding in dens and caves, and tamely leaving all their substance as plunder to the invaders, now rally around their leader.