Judges 6:3, 5, 33

Whenever the Israelites planted their crops, marauders from Midian, Amalek, and the people of the east would attack Israel

These enemy hordes, coming with their livestock and tents, were as thick as locusts; they arrived on droves of camels too numerous to count. And they stayed until the land was stripped bare.

Soon afterward the armies of Midian, Amalek, and the people of the east formed an alliance against Israel and crossed the Jordan, camping in the valley of Jezreel.