The purpose of our research is to define a battle unit and to create a systems evaluation process to evaluate the military impact and value of using Scramjet technology in weapons systems as envisioned in military scenarios defined for the battle unit to engage threats. The initial stakeholder is the United States Army. The stakeholder needs are defined as follows: evaluate the possible contribution of Scramjet technology to Arm), transformation and development of future combat systems. Evaluations will then be measured against the objectives of flexibility, adaptability, lethality response time, and the resultant impact on mission success. We model the system of attacker and defender by a network of queues with special queuing and service rules. Our battle unit will consist of a sensor system, a command and control system, and a defender system with n units. The units will have attributes assumed to be given. We will approximate the system evaluation by a network of queues with balking and general service and general arrival distributions.