3 Nephi 4:10

"But in this thing they were disappointed, for the Nephites did not fear them; but they did fear their God and did supplicate him for protection; therefore, when the armies of Giddianhi did rush upon them they were prepared to meet them; yea, in the strength of the Lord they did receive them."

The Nephites had the strength of the Lord with them as they battled the Gadianton robbers. No wonder they were so victorious. God is always the winner in battles against evil. When he is on our side we will never lose!