You can’t do too much research and you can’t be too prepared in a SHTF situation. From Klark Barnes at earlking56.family.blog:

When planning for a SHTF Survival situation, there is really only one thing that you can be absolutely sure of: Survival is going to be a much bigger and tougher challenge than you ever thought possible. While there are some things you can do to prepare yourself for the chaos ahead, the reality of the situation is that when things go bad, there are going to be things happening that none of us prepared for or could have ever imagined.
What is SHTF?
SHTF has multiple survival meanings, but the acronym itself means Shit Hits The Fan. The meaning is pretty straight forward, but basically, it’s just a prepper/survivalist’s way of saying that during a long term survival crisis or collapse of society things are going to get bad, real bad! How bad none of us really know, and what dangers we will face is only speculation at this point, but one thing we do know for sure is that most people have no real clue to the dangers they will face during a collapse scenario.