Judges 7:20-22 NIV
The three companies blew the trumpets and smashed the jars. Grasping the torches in their left hands and holding in their right hands the trumpets they were to blow, they shouted, “A sword for the LORD and for Gideon!” While each man held his position around the camp, all the Midianites ran, crying out as they fled.
When the three hundred trumpets sounded, the LORD caused the men throughout the camp to turn on each other with their swords. The army fled to Beth Shittah toward Zererah as far as the border of Abel Meholah near Tabbath.
NIV: New International Version