War Aims and War Outcomes

Abstract

Why are states with tremendous advantages in capabilities and resources often unable to attain even limited objectives vis-à-vis much weaker adversaries? The theory I develop focuses on how the nature of a strong state's war aims affects prewar uncertainty about the cost of victory. I argue that the relative magnitude of the effect of military strength and resolve on war outcomes varies with the nature of the object at stake and that strong states become more likely to underestimate the cost of victory as the impact of resolve increases relative to that of war-fighting capacity. I evaluate the empirical implications of this theory against the historical record provided by the universe of major power military interventions since World War II. The results challenge both existing theories and conventional wisdom about the impact of factors such as military strength, resolve, troop commitment levels, and war-fighting strategies on asymmetric war outcomes.