Increased fuel efficiency in military vehicles today results in two primary positive impacts to operational conditions. The first is the reduction in cost; both as a result of reduced fuel consumed and also in the costs saved due to the reduction in logistics required to transport fuel to the Warfighter in the field. The second and more important positive impact is the reduced risk of casualties to the Warfighter by reducing the frequency of fuel related logistical support required in the field. This paper first provides an overview of the development of the Fuel Efficient Demonstrator (FED) Bravo vehicle from initial conceptual efforts through to final operational shake-out and performance testing. A review the development process from CAD modeling through to fabrication and testing will be discussed. This discussion will also focus on the unique methods and ideas used to address the particular challenges encountered in developing a demonstrator vehicle. The paper concludes with the results of this effort including a review of the objectives exceeded, met or not achieved.