The rivalry between the Hatfields and the McCoys is one of the oldest and best-known family feuds in American history. This miniseries, featuring a cast led by Kevin Costner and Bill Paxton as the family patriarchs, tells the story of the feud that nearly launched a war between Kentucky and West Virginia. Devil Anse Hatfield and Randall McCoy were close friends until near the end of the Civil War, when they return to their homes -- Hatfield in Kentucky and McCoy in West Virginia -- to increasing tensions and misunderstandings that quickly lead to all-out warfare between the clans (partially caused by a stolen pig). As hostilities grow and outside forces join the fight, the states where the families live are brought to the brink of another war as the feud makes international headlines, the states' governors clash and the U.S. Supreme Court eventually intervenes.