In 2 Chronicles 20:1-30, King Jehoshaphat and Judah face a vast invading army, respond with national fasting, humble corporate prayer, and complete dependence on God, who promises through a prophet that the battle belongs to Him. As the people march out singing praises to the Lord, He causes the enemy forces to destroy one another, granting Judah a complete victory without fighting, demonstrating that spiritual warfare is won through prayer, faith, worship, and trusting God rather than human strength.