BITNs on 21st century battlefields are used to achieve information superiority, complete information sharing and superior connectivity for all joint C2 nodes and sensors for military forces. The modeling and simulation of such complex and distributed systems requires concise, formal modeling and description techniques. One reasonable and available framework based on general infrastructure was provided and it allows performing qualitative and quantitative analyses. Modeling approaches were then introduced according to the possible entities including in creditable M&S. Data flow generation and traffic load modeling methodology could be realized by introducing message templates and their passing scheme analogous to real world interaction, or automatic traffic loading depending on the stochastic behavior of traffic flows. BITN's routing and re-networking, survivability analysis, and nodes and links' modeling were also discussed and several leading-edge technologies were provided.