The fog of war plays a prominent role in Carl von Clausewitz’s reflections on armed struggle. In Ann Hironaka’s rethinking of war, that fog becomes all consuming, obscuring the information needed to understand and prepare for battle. Victory in war is unpredictable and tantamount to random in clashes between competitors with roughly comparable power (41). Power being hard to measure, strategists can rarely know how costly a war will be. Predictions of casualties in the 1991 Gulf War, for example, were too low by an order of magnitude (10). Strategists commonly miscalculate the best strategy in a given context, for example, seeing the offense as having the advantage on the eve of World War I while expecting the defense to dominate in World War II. With profound uncertainty encumbering military analysis, defining the national security interest of the state becomes arbitrary, Hironaka argues.