I have a fairy tale for you. Once upon a time, a representative democracy was established with a constitution that distilled the wisdom of the ages. Its foundational principles included civilian control of the military and a system of checks and balances that encouraged vigorous public debate as a basis for effective policy-making.
In this fabled land, the role of civilian leaders was, in part, to serve as a check on military ambition and endless wars. They were to prove cautious, too, in committing their citizen-soldiers to battle, and when they did, they would issue Congressional declarations of war so that everyone could grasp the nature of the national emergency at hand and the necessity of military action. In waging war, they would rely on shared sacrifice and even raise taxes. When necessary, it was their job to rein in or even remove military leaders who acted like Caesar (read: General Douglas MacArthur) rather than Cincinnatus (read: General George Washington).