My dad told me that when he was in the Army in the 50's they had to heat up the K rations using the engines of jeeps and trucks. I had my own experience with food in the military, back when I was in Navy separations the food we got was just like food you'd get in the joint. After a while of eating powered scrambled eggs one day my stomach was just like "Nope, put the fork DOWN!". I couldn't eat real scrambled eggs for nearly two years after that.
