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yeah you can.

https://en.wikipedia.org/wiki/Meal,_Ready-to-Eat

i have no military experience but i'm guessing this is actually one of the easiest things to strategically deploy. a day's worth of ammo for a platoon probably weighs a few hundred pounds. a day's worth of food is probably like 10 pounds.

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But: 1. in most wars the soldiers are actually fighting a very small proportion of the time. They are eating, drinking and creating waste every day. 2. Those dehydrated rations will need to be rehydrated. So you need to supply in the region of 3 litres of clean (soldiers are not as effective if they are sick) water each day (more in hot climates).

MREs aren't dehydrated. That's why they're called "ready to eat"; you just open the pouch and chow down.

in a forward operating base there are firefights every day.

see: restrepo, korengal films.

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