Hatfields & McCoys
You may or may not have been watching this. But I highly recommend you take the time to view this entire series.
To understand more about the kind of people who perpetuated this feud, read the chapter A Culture of Honor in Malcolm Gladwell's book Outliers. Here's a short snippet.
Outliers - Culture of Honor by Malcolm Gladwell
BE SURE TO LISTEN TO THE 23 MINUTE AUDIO SNIPPET OF THE BOOK AT THE ABOVE LINK!
Assh0le...

We have seen members of this "Culture of Honor" posting on these Forums. At times it's been entertaining; other times, not so much. But the more you understand, the more you can predict. And knowing your fellow man is the most important step in self-preservation.
- Bill