The Battle Is the Lord
The Lord does not save with a sword and a spear. Therefore, you do not need to fear the Giants because the battle is the Lord.
He will deliver the giants into your hand (1 Samuel 17:45-47).
When Your people go out to battle against their enemy, wherever You send them, and when they pray to the Lord toward the city which You have chosen and the temple which I have built for Your name, then hear in heaven their prayer and their supplication, and maintain their cause.
(1 Kings 8:44-45)