The cause of the War of the Roses in England (1455-1487) was rooted in a dynastic struggle for the English throne between two noble houses: the Lancasters and the Yorks. Disputes over the legitimacy and succession of the monarchy, especially surrounding the reign of King Henry VI, who was viewed as an ineffective ruler, heightened tensions. The conflict was marked by power struggles, battles, and shifting allegiances among the nobility, as both factions sought control of the crown. Ultimately, the war concluded with the rise of the Tudor dynasty, which established significant changes in governance and resolved the ongoing rivalries that marked this turbulent period in English history.