The roles of DBMSs in most of existing defense M&S(Modeling & Simulation) simulations are limited to fields like storing some read-only data referred during simulation and log data kept for after-action-review processes. Utilizing DBMSs in defense M&S simulations allows systematic/efficient data management and easy development of M&S simulations. In addition, advanced data analysis on simulation results would be possible via improved performance in data analysis, application of data mining

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... iques, etc. We proposed a new DBMS-based defense M&S simulation interoperating environment which provides defense M&S simulations with professional data management capabilities and guarantees interoperability between each simulation through distributed DBMS synchronization. For that purpose, we designed SimCoreDB, a standard simulation core DB for defense M&S simulations operating in this environment, in a relational/object-oriented model, and built SimCoreDB on commercial DBMSs for each data model. We also implemented a defense M&S simulation testbed using SimCoreDB and performed experiments to assess the conformity and performance of SimCoreDB built on relational/object-oriented DBMSs.