Today's modern Armed Forces have various information systems developed independently with different software arthitectures for different purposes. Due to Network Centric Warfare (NCW), training, mission rehearsal and planning analysis requirements, interoperability of these information systems gets more important in peace, exercise, crisis and battle environments. However, because of paying insufficient attention to data models and data exchange standards compatibility in these systems, interoperability remains as a crucial and critical problem. Thus, Battle Management Language (BML) is a universal standard that is being developed as a solution to this problem. BML is the unambiguous language used to command and control forces and equipment conducting military operations and to provide for situational awareness and a shared, common operational picture. In other words, BML can be defined as a standart representation of commander's orders, intents and reports to be understood by both live forces and automated systems, for simulated and real- world operations. In addition to this, BML provide development of Command, Control, Communication, Computer and Intelligence (C4I), Modeling Simulation (M&S) and robotic systems through a common data model. In this way, BML yields the achievement of interoperability capability in the system design phase. In this study, after introducing interoperability of information systems briefly, BML approach and its literature review is presented. Furthermore, important points are highlighted following the examination of the requirements of Armed Forces and the actions to meet these requirements are emphasized. [ABSTRACT FROM AUTHOR]