Over the past few decades, the US military has put much effort into developing combustion engines capable of "multi-fuel" operation for land vehicles. The reason being that they could use any locally available fuel supply such as gasoline, diesel, alcohol, etc. Never figured out a truly practical "multi-fuel" engine design, but all their recip engines now use a standard JP-8 heavy fuel.
One significant issue with military fuel logistics is the cost/gallon to transport it. The cost for transporting JP-8 fuel to Afghanistan is something like $400/gallon.