No one will be drafted, and those who serve will do so eagerly rather than grudgingly. That army will make up "the body of Christ" (1Corinthians 12:25-27). We are to be "a good soldier of Jesus Christ" (2 Timothy 2:3-4). We are to "put on the whole armour of God" (Ephesians 6:10-11).
Romans 13:12, "...let us therefore cast off the works of darkness, and let us put on the armour of light."
Know your enemy: The "wiles of the devil" is our enemy, "We wrestle not against flesh and blood but against principalities, against powers, against the rulers of the darkness of this world, and against spiritual wickedness in high places" (Ephesians 6:11-12, 2 Corinthians 10:3). People are not your enemy, we are not to fight against one another. The things of the world are our enemy (James 4:4, Romans 12:2, 1 John 2:15, Luke 16:15).
A good soldier knows his weapon. We are to take the "helmet of salvation" and "the sword of the Spirit, which is the word of God" (Ephesians 6:17). When Jesus said, "...I came not to send peace, but a sword " (Matthew 10:34), He didn't mean a literal sword. He came to set men striving for a better world with a soldiers fervor and force of spirit.
Know your weapon: "study to show thyself approved unto God" (2 Timothy 2:15). Know your weapon: we are to "search the scriptures" (Acts 17:11, Luke 16:29, Isaiah 8:20; 34:16), and compare scripture with scripture (Isaiah 28:10) to come to the Truth. "For the weapons of our warfare are not carnal, but mighty through God" (2 Corinthians 10:4). "Every word of God is pure: he is a shield unto them that put their trust in him" (Proverbs 30:5, Ephesians 6:16). We are to put on the "breastplate of righteousness" (Ephesians 6:14), and our "feet shod with the preparation of the gospel of peace" (Ephesians 6:15).
A good soldier stays in step. We are to walk in the "same steps as Christ" (2 Corinthians 12:18, 1 Peter 2:21). And most important, our secret weapon: we are to be "praying always with all prayer and supplication in the Spirit" (Ephesians 6:18), so that you may "open your mouth boldly, to make known the mystery of the gospel" (Ephesians 6:19). "We are more than conquerors through him that loved us" (Romans 8:37). We are "fellowsoldiers" (Philippians 2:25, Philemon 1:2).
Ephesians 6: 10-18 Finally, be strong in the Lord and in his mighty power. 11 Put on the full armor of God so that you can take your stand against the devil's schemes. 12 For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. 13 Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand. 14 Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness in place, 15 and with your feet fitted with the readiness that comes from the gospel of peace. 16 In addition to all this, take up the shield of faith, with which you can extinguish all the flaming arrows of the evil one. 17 Take the helmet of salvation and the sword of the Spirit, which is the word of God. 18 And pray in the Spirit on all occasions with all kinds of prayers and requests. With this in mind, be alert and always keep on praying for all the saints.
"A man may have to die for our country, but no man must, in any exclusive sense, live for his country. He who surrenders himself without reservation to the temporal claims of a nation, or a party, or a class is rendering to Caesar that which, of all things, most emphatically belongs to God; himself." C.S. Lewis.