John Mearsheimer - Conventional Deterrence

Mearsheimer's first book Conventional Deterrence (1983) addresses the question of how decisions to start a war depend on the projected outcome of military conflict. In other words, how do decision makers' beliefs about the outcome of war affect the success or failure of deterrence? Mearsheimer's basic argument is that deterrence is likely to work when the potential attacker believes that a successful attack will be unlikely and costly. If the potential attacker, however, has reason to believe the attack will likely succeed and entail low costs, then deterrence is likely to break down. This is now widely accepted to be the way the principle of deterrence works. Specifically, Mearsheimer argues that the success of deterrence is determined by the strategy available to the potential attacker. He lays out three strategies. First, a war-of-attrition strategy, which entails a high level of uncertainty about the outcome of war and high costs for the attacker. Second, a limited-aims strategy, which entails less risks and lower costs. And, third, a blitzkrieg strategy, which provides a way to defeat the enemy rapidly and decisively, with relatively low costs. For Mearsheimer, failures in the modern battlefield are due mostly to the potential attacker's belief that it can successfully implement a blitzkrieg strategy in which tanks and other mechanized forces are employed swiftly to effect a deep penetration and disrupt the enemy's rear. The other two strategies are unlikely to lead to deterrence failures because they would entail a low probability of success accompanied by high costs (war of attrition) or limited gains and the possibility of the conflict turning into a war of attrition (limited aims). If the attacker has a coherent blitzkrieg strategy available, however, an attack is likely to ensue, as its potential benefits outweigh the costs and risks of starting a war.

Besides analyzing cases from World War II and the Arab-Israeli conflict, Mearsheimer extrapolates implications from his theory for the prospects of conventional deterrence in Central Europe during the late Cold War. Here, he argues that a Soviet attack is unlikely because the Soviet military would be unable to successfully implement a blitzkrieg strategy. The balance of forces, the difficulty of advancing rapidly with mechanized forces through Central Europe, and the formidable NATO forces opposing such a Soviet attack made it unlikely, in Mearsheimer's view, that the Soviets would start a conventional war in Europe.