I specifically mentioned that some things like eating tools were obvious enough to leave out .A Spoon would be handy ...one can eat almost anything with a spoon.
Some sort of pocket knife...
A book , be it a Bible , a copy of Shakespeare , etc ...Lots of boring downtime , even when in a combat zone.
Perhaps a deck of cards or dice for the "sporting fellas"....
While my last two may seem a bit out of place for "survival tools"...
Mental relief from the boredom that can make up much of military life and to escape the horrors of war , is important.
And while the "Civil War" was a bit before my time in the army...I feel that some things will hold true , no matter when one served.
Umm what ?
Anyway, how about a tin with some char-cloth and a flint? All the stories note that when an army moved on, typically all the fences had been burned for firewood.
Great writing Steve! If you have more I'd like to read that as well
My kids would ask how they charged their iPads on the march.