A sword for the Lord and for Gideon!

Judges 7:15-25
Gideon and his 300 men, they shouted, “A sword for the Lord and for Gideon!” 
The Lord caused the men throughout the camp to turn on each other with their swords.
Israelites from Naphtali, Asher and all Manasseh were called out. Gideon sent messengers through out the hill country of Ephraim,"Come down against the Midianites and seize the waters of the Jordan ahead of them as far as Beth Barah."
Why?
Gideon uses his wits in the surprise attack, but the victory in the ensuing(隨後) rout(大敗) is God's.
Once again God go ahead before Gideon, the victory is belong to the Lord.
Because Gideon heard the dream in the camp of Midianites, "This can be nothing other than the sword of Gideon, the Israelite. God has given the Midianites and the whole camp into his hands." so they shout "A sword for the Lord and for Gideon."
How?
Be encouraged, follow God's way and work with God, there is victory belong to the Lord, we are working with the Lord.