The best way to determine what you need could easily be by conducting a drill or dry run before need arises - Probably the best second choice in determining what is needed is to talk to someone who has faced it. Consider this:
From a Sarajevo War Survivor:
Experiencing horrible things that can happen in a war - death of parents and
friends, hunger and malnutrition, endless freezing cold, fear, sniper attacks.
1. Stockpiling helps. but you never no how long trouble will last, so locate
near renewable food sources.
2. Living near a well with a manual pump is like being in Eden.
3. After awhile, even gold can lose its luster. But there is no luxury in war
quite like toilet paper. Its surplus value is greater than gold’s.
4. If you had to go without one utility, lose electricity - it’s the easiest to
do without (unless you’re in a very nice climate with no need for heat.)
5. Canned foods are awesome, especially if their contents are tasty without
heating. One of the best things to stockpile is canned gravy - it makes a lot of
the dry unappetizing things you find to eat in war somewhat edible. Only needs
enough heat to “warm”, not to cook. It’s cheap too, especially if you buy it in
bulk.
6. Bring some books - escapist ones like romance or mysteries become more
valuable as the war continues. Sure, it’s great to have a lot of survival
guides, but you’ll figure most of that out on your own anyway - trust me, you’ll
have a lot of time on your hands.
7. The feeling that you’re human can fade pretty fast. I can’t tell you how many
people I knew who would have traded a much needed meal for just a little bit of
toothpaste, rouge, soap or cologne. Not much point in fighting if you have to
lose your humanity. These things are morale-builders like nothing else.
8. Slow burning candles and matches, matches, matches
From a Sarajevo War Survivor:
Experiencing horrible things that can happen in a war - death of parents and
friends, hunger and malnutrition, endless freezing cold, fear, sniper attacks.<<<
Excellent report and so very true.
It costs little to print up pages for the kids to color and enjoy, print them some books and hide till you really need them.
The Mormon’s teach that the fruits need to be stored and the makings for pudding and jello as we will all be difficult to live with, if we are eating rice and beans and nothing else.
When we first hauled water and was not set up for storage, I know what even running water to wash my hands at the gas station felt like.
So a war would multiply those feelings and after dealing with the sick and maimed, one would need perfume and a change.