All DOD vehicles are getting hungrier for electricity. Or you might say, DOD is demanding more electricity from its vehicles, as this great presentation from IDGA's 2008 Tactical Vehicles Summit graphically illustrates. It's a narrated slide deck, and well worth your while: here.
Note, this stuff is not to be confused with plug-in hybrids and full electric vehicles. These are all gas burners, which like their distant relatives in utilities (co-generation) and homes (micro co-generation), extract multiple forms of power goodness (e.g. heat, mechanical energy, electricity) from combustion.
Presentation & Chart: from Michael Gallagher