That's misleading. The vast majority of crude oil is used to make fuels used by consumer cars, trucks and planes. The military uses very little overall, it's about 1% of the US's total energy consumption.
http://www.dailyenergyreport.com/how-muc...
Standard Oil
They don't but they do control Crude Oil prices and that makes the USA toe the line.
The U.S. military is the single largest consumer of oil on Earth.
