What do you think HEVs must be saving or helping the military application if they switch from tradition vehicle to electric vehicle? Cost of the fuel.
As per the survey reports, the transportation fuels on the battlefield or on site have often been seen as a risky adventure or risky routes. The over long distances raise the fuel cost significantly via road or via airlift. Another goal is the reduction or elimination of noise by the vehicles carrying the military applications. It helps in creating a better surrounding for the vehicle to navigate or travel across the battlefield with less amount of noise produced by such fuel driven vehicles.
In my opinion, ones you focus on eliminating the cause or obstacles on the road to electric vehicle, you can actually see the benefits of such vehicles and how it is helping in creating a pollution free environment or leading a sustainable path for better navigation and transportation facilities between cities or countries or also on the battlefield.
Source:-Hybrid Electric Vehicles (Principles and applications with practical perspectives) by Chris Mi, M. Abul Masrur and David Wenzhong Gao.