While I certainly agree with your statement, I am of the belief that Soldier's are not judged for war and killing.Love your fellow man, pray for the Koreans, pray for your government, less you kill another human being and be judged by the Lord.
The Second Vatican Council stated, “Those who are pledged to the service of their country as members of its armed forces should regard themselves as agents of security and freedom on behalf of their people. As long as they fulfill this role properly, they are making a genuine contribution to the establishment of peace.” So no, a soldier does not necessarily need to confess his killing of other soldiers in combat. Provided that the war is just, this killing is not a sin as it is not the taking of an innocent human life; it is stopping an unjust aggressor for the sake of the common good.
Preventive War. The concept of a "preventive war" -- also called a war in the cause of justice -- goes beyond the "just war" theory. It sees war as legitimate not only in response to aggression, but also in anticipation of it.
Proponents argue that if self defense is biblically permissible, then why would it not also be permissible to act in anticipation of an impending threat? Should we sit idly by, waiting for the enemy to deal the first blow, and thereby needlessly risk the lives of our citizens?
No, say proponents of this view. In the face of a clear and present danger, Christians may legitimately go to war to prevent an attack. A preventive or preemptive strike is fully justifiable.
But there is a further dimension to the preventive war theory. It also views war as a legitimate means of correcting gross injustices. Christian nations must stand against those who use their power to hurt the innocent, regardless of where such crimes are perpetrated.
When outrageous and heinous behavior occurs (Hitler's atrocities, for instance) Christians are obligated, proponents contend, to stand against moral evil as agents of God. In the face of extreme injustice, Christians are duty bound to help lift the yoke of oppression from peoples being victimized by evil rulers, or to come to the aid of innocent nations whose existence is threatened by aggressive outside powers.
http://www.ptm.org/02PT/MayJun/war.htm