How Can a Soldier Reconcile Killing His Enemies with God’s Command to Love?

Questions about how a soldier in combat can reconcile killing his enemy with God’s command to love our enemies and whether or not it’s okay to pray for angels to be with and protect people.

• How ought a soldier in combat to conduct himself in order to reconcile the directive to kill his enemy with God’s commandment to love and do good to those who hurt him?
• What do you think about praying for angels to be with and protect people?