Wars of the Roses

noun English History.
  1. the civil struggle between the royal house of Lancaster, whose emblem was a red rose, and the royal house of York, whose emblem was a white rose, beginning in 1455 and ending with the accession of Henry VII in 1485 and the union of the two houses.
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British Dictionary definitions for wars of the roses

Wars of the Roses

pl n
  1. the conflicts in England (1455–85) centred on the struggle for the throne between the house of York (symbolized by the white rose) and the house of Lancaster (of which one badge was the red rose)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012