This paper presents a reconfigurable military simulation framework that reflects behaviors of a C3 system, consisting of command & control (C2) and communication (C). To achieve this goal, this paper identifies models in the C3 system and defines the interfaces between the models. In detail, we dispart a C2 simulation framework as three components: the C2, the military unit, and the communication agent model. We also suggest a new metamodel that can represent the dynamic property of the communication simulator. With the enhanced modularity of the C2 system and the new metamodel, users can assess various structures of the C2 system and rapidly calculate the diverse effects of communication. From case studies, we can test the new structure for the C2 system and gain improved performance with regard to speed by using the metamodel. Finally, we expect that this work will help decision makers evaluate various scenarios in a short time.