. . . "major feud" . "an acrimonious rivalry" . . "Percy\u2013Neville feud" . . . "deep feud" . . "sporadically violent struggle" . . "feud" . "the armed feud between both houses" . . "between the Percies and the Nevilles." . . "struggle for local supremacy" . . "Percy\u2013Neville feud" . "their rival" . "feud with the Percy family" .