A family tale vendetta in the US

The Hatfield family was from England, the Mc Coy family was from Ireland and they lived between West Virginia and Kentucky in the 19th century. A feud occured between those two families for almost 100 years, a lot were killed. It began by a killed body when returning from the Civil War battle, it continued with a dispute about a ownership of a hog and a love affaire between two young people of both families.
It stays as a symbol in american memory of the perils of family honor, justice and vengeance.
It has inspired plays, movies, tourist tours.