The “asymmetry myth” is that war crimes are committed by one's enemies but never, or hardly ever, by one's own combatants. The myth involves not only a common failure to acknowledge our own actual war crimes but also inadequate reactions when we are forced to recognize them. It contributes to the high likelihood that wars, just or unjust in their causes, will have a high moral cost. This cost, moreover, is a matter needing consideration in the jus ante bellum circumstances of preparedness for war as well as of conduct within it. As part of the symposium on Ned Dobos's book, Ethics, Security, and the War-Machine, I will argue that the strength of the asymmetry myth is sustained by certain forms of romantic nationalism linked to the glamorization of military endeavor.