Currently, military actions are orchestrated within cyberspace and thus degradation or denial of service to cyberspace assets can have major consequences in combat. Based on general military strategies, with a focus on Command and Control, this paper proposes an architecture for cyber defense simulation that aims to unite kinetic environments with cyber environments. This architecture supports the creation of a flexible environment in which different attack and disaster scenarios can be quickly developed and evaluated. A tactical scenario is used to evaluate the architecture. With a cyber-defense simulator, a commander can evaluate the current situation of the battlefield cyberspace, discern and correct potential vulnerabilities, and design future actions.