For the LORD your God is the one who goes with you to fight for you against your enemies to give you victory. (Deuteronomy 20:4)
Remember this verse when you are in a spiritual battle with the enemy. God is with you to fight for you against the spiritual forces of darkness. He is a warrior and he will win the battle for you.
The above exhortation was what the priest was to tell the Israelites who were going to war against their enemies. Moses writes,
When you are about to go into battle, the priest shall come forward and address the army.
He shall say: "Hear, O Israel, today you are going into battle against your enemies. Do not be fainthearted or afraid; do not be terrified or give way to panic before them." (Deuteronomy 20:2, 3)
And then he would proclaim the promise that we read in the title verse.
The prophet Jeremiah was strengthened by the Lord when he faced a rebelling nation. God gave him this promise....
They will fight against you but will not overcome you, for I am with you and will rescue you....... (Jeremiah 1:19)
Yes, the Lord is with you to fight your battles too. Trust in him.