A strategic nuclear weapon refers to a nuclear weapon which is designed to be used on targets often in settled territory far from the battlefield as part of a strategic plan, such as military bases, military command centers, arms industries, transportation, economic, and energy infrastructure, and heavily populated areas such as cities and towns, many which often contains such targets. It is contrast to a tactical nuclear weapon, which is designed for use in battle, as part of an attack with and often in close proximity to friendly conventional forces possibly on contested friendly territory.