After reading the article about the diet of the civil war soldiers, I would gladly give up food. I’m not an avid coffee drinker but if I had to choose between coffee and maggot infested meat that would most likely kill me or make me violently sick, definitely coffee. You cant afford to be sick whilst fighting a war. Coffee has caffeine which would get me hyped, the addiction for the coffee will give me something to crave and many times curb my appetite. You boil water long enough most germs are killed.
There’s one food I don’t wish to do without, It’s “bouillon”. It’s a one pot where everything is cooked in the same pot, very similar to a hearty stew served with hard crusted bread.