Geography and nuclear arms control might seem an odd match in subject matter. But there are a number of aspects of nuclear arms control, including proliferation, arms reductions, and missile defenses, that are embedded in geostrategic assumptions and perspectives. The following discussion identifies some of the geostrategic contexts within which nuclear deterrence, war planning and arms control must take place. As Professor Colin Gray has noted: “The influence of geography upon the character of conflict is pervasive at all levels of analysis: policy, grand strategy, military strategy, tactics, and technological choices and performance.”1