Yet that can't dismay us. It can't make us give up. We can't let that scare us.
When we sing the Lord's praises, 2 Chronicles 20:17 says, You will not have to fight this battle. Take up your positions; stand firm and see the deliverance the Lord will give you. Do not be afraid; do not be discouraged. Go out to face them tomorrow, and the Lord will be with you.
In a nutshell, the Lord will stop your enemies and make it so they actually start fighting amongst themselves just like they did before Jehoshaphat's army showed up to fight. When Jehoshaphat's army got to the battle ground it was all over. The enemy was dead. Every last one of them. Thus, the only thing Jehoshaphat's army had to do was lift their voice.
Praise, show up, and collect. That's all.