The modern international order rests on a foundational promise: states must resolve disputes peacefully, and force may be used only as a last resort and only within the bounds of law. The US helped build this system after World War II, embedding these principles in the UN Charter and in its own Constitution. Yet the US military operations in Venezuela in January 2026 and in Iran on February 28, 2026 represent a sharp break from these commitments. Both actions were undertaken without United Nations authorization and without congressional approval, raising profound questions about legality, constitutional governance, and the erosion of...