Hatfields and McCoys

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Hatfields and McCoys

19th-century mountain families carried on endless feud in southern U.S. [Am. Hist.: NCE, 942]
See: Rivalry
References in periodicals archive ?
Either because of hostility to foreign occupation or because our troops simply sided with someone else's rival, akin to supporting one side in a Hatfield-McCoy feud, 2009 became the deadliest year of the war, doubling the amount of American dead in 2008.
Patriots-Jets rivalry similar spiritually to Hatfield-McCoy feud, minus the livestock.
The bull-versus-bear argument has all of the vices of the Hatfield-McCoy feud.