Many approaches to agent collaboration have been introduced in military war-games, and those approaches address methods for actor- (agent-) collaboration within a team to achieve given goals, where the team's abstract mission is translated into concrete tasks for each actor. To meet fast-changing battlefield situations, an actor must be 1) loosely coupled with their tasks and be 2) able to take over the role of other actors if necessary to reflect role handovers occurring in real combat. Achieving these requirements allows the transfer of tasks assigned one actor to another actor in circumstances when that actor cannot execute its assigned role, such as when destroyed in action. Tight coupling between an actor and its tasks can prevent role handover in fast-changing situations. Unfortunately, existing approaches and war-game software strictly assign tasks to actors during design, therefore they prevent the loose coupling needed for successful role handover. To overcome these shortcomings, we have defined Role-based Command Hierarchy (ROCH) model that dynamically assigns roles to actors based on their situation at runtime. In the model we devise “Roleâ€� to separate actors from their tasks. Described in this paper, we implement the ROCH model as a component that uses a publish-subscribe pattern to handle the link between an actor and the roles of its subordinates (other actors in the team). Therefore, an actor can indirectly send a message (order or report) to another actor without knowing which actor is recipient. The sender actor is only required to know the relevant roles. The model has been implemented and tested in a military project, and we briefly show the outcomes in this paper.