How do/did you survive post-war social disarray and unreliable/non-existent supply chains?

This started as a post on asking about how long you think you could survive a massive supply chain disruption and associated collapse of authorities ability to intervene.

But the more I thought about it, the more it seemed to paint a picture of a postwar context. Post-Yugoslavian War, post-Korean War, etc. Also, I don’t know if we’ve had any recent memories of sudden, total plunges into anarchy.

I wonder if the modern economy has lengthened the farm-to-table too much that no one could reasonably expect to sustain themselves for any longer than they have food in storage.

What strategies would you use/did you use to survive? Did society break down into roving gangs? If such a thing happened now, do you feel like you could weather the storm?

You can thank my being snowed in the last few days and watching World War Z, The Last of Us, Book of Elijah, Elysium, the Alone TV series and the Band of Brothers for inspiring this post.