Military power has long been central to U.S. global dominance, but the war on Iran is testing its limits. This is more than just another conflict; it marks a potential turning point. Critics argue that Washington's reliance on force over diplomacy and unilateral actions instead of multilateral cooperation signal a shift toward coercion, accelerating the very decline the U.S. seeks to avoid. Is this a moment of American dominance or reckoning? Is the U.S. reinforcing its global primacy or hastening a shift toward a more fragmented, post-American world?