For all our talk of war we often miss the battlefield. The apostle Paul, in the sixth chapter of his epistle to the Ephesians, speaks of putting on the whole armor of God that the soldier of God might stand against the devil.
10 Finally, be strong in the Lord and in the strength of his might. 11 Put on the whole armor of God, that you may be able to stand against the schemes of the devil. 12 For we do not wrestle against flesh and blood, but against the rulers, against the authorities, against the cosmic powers over this present darkness, against the spiritual forces of evil in the heavenly places. 13 Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand firm.
We note here that our ultimate enemies are not human beings, but spiritual forces. The way we fight spiritual forces differs from how we face physical, fleshly beings.