It's The Lord's Battle

The Angel of the Lord encamps around those who fear Him [who revere and worship Him with awe] and each of them He delivers.

Psalm 14:7

In the Old Testament, people carried banners when they went to war, sending the singers and praisers into the battle first. When the tribe of Judah sang "Oh, give thanks to the Lord, for He is good, for His mercy endures forever" (see 2 Chronicles 20:21), the enemy was so confused they were self-slaughtered and self-defeated (see v. 22).

When King Jehoshaphat prepared for battle, he took the position of getting on his face to worship God (see v. 18). If you have battles to face, get in the position of warfare, and just worship the Lord. God's response to our worship is, "Be not afraid or dismayed at this great multitude; for the battle is not yours, but God's" (v. 15).