Better to fire than be fired upon. Better to leave the moral high ground to those who worship the romance of endless bloodshed and defeat. Better to lose the peace and win the war
In our modern age, things no longer exist to perform their function. Washing machines aren't designed to clean clothes, but to save water and energy. Food isn't there to be eaten, but not eaten. And armies aren't there to win wars, but to be moral. And the truly moral army never fights a war. When it must fight a war, then it fights it as proportionately as possible, slowing down when it's winning so that the enemy has a chance to catch up and inflict a completely proportional number of casualties on them.