>>2329656it was heavily exaggerated
but it was mostly common sense
planning for 1-2 years of cut off from the world, while the rest of the world is still in tact is easy
stock on goods that are not locally produced and come in daily/weekly with trucks in the area, while are in heavy use
lighters, batteries (back then, right now? a few lithium ones can last for more than 2 years), canned food, rice and other grains, hardtacks and flour, canned tuna for protein, you can work this out.
Boolets if you are going to fight and not run away, which is stupid against organized army. Boolets for trade is stupid too, since organized army wont buy shit from you and the militias and people who wish to fight will just take it by force anyway.
THINK, this is your real takeaway from that infographic.