Which conflict decimated the ranks of the English nobility and established Henry Tudor as King of England?

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The conflict that decimated the ranks of the English nobility and established Henry Tudor as King of England was the War of the Roses, a series of battles fought between the House of Lancaster (symbolized by the red rose) and the House of York (symbolized by the white rose). This conflict lasted from 1455 to 1485 and resulted in the deaths of many noble houses, including the Plantagenets. The final battle was the Battle of Bosworth, in which Henry Tudor, a Lancastrian, defeated Richard III, a Yorkist, and established the Tudor dynasty.

Which Conflict Decimated the Ranks of the English Nobility and Established