Judges 7 (résumé): Gideon defeats the Midianites

The Midianites and Israelites were camped on opposing sides of a valley when God told Gideon that he had too many men. So God told Gideon to instruct all that were afraid to go home, and 22,000 did so leaving just 10,000 fighting men. However God still felt the Israelites were too many, so he instructed Gideon to get the men to drink water and those that cupped the water in their hands would be chosen for battle, and just 300 remained! So God had reduced Israel from 32,000 to 300 to make sure Israel realized that the victory was given by God. 

Gideon, encouraged by an overheard Midianite dream, led the 300 men to attack the Midianite camp at night, and using trumpets, torches and battle cries they sowed panic and mayhem in the camp causing them to turn on each other and flee, and producing a resounding victory for Israel. Then Gideon called in reinforcements to aid in the pursuit, and they captured and killed two of the Midianite leaders and took their heads to Gideon!