Wars of the Roses Richard of York, 3rd Duke of York. By 1453, issues had come to a head: though Margaret of Anjou was pregnant, Henry VI was descending into increasing mental instability, by August becoming completely non-responsive and unable to govern. A Great Council of nobles was called, and through shrewd political machinations, Richard had himself declared Lord Protector and chief regent during the mental incapacity of Henry. In the interlude, Margaret gave birth to a healthy son and heir, Edward. By 1455, Henry had regained his faculties, and open warfare came at the First Battle of St Albans. Several prominent Lancastrians died
Wars of the Roses line, as descendants of Edward III's second son Lionel of Antwerp. Edmund's second son, Richard, Earl of Cambridge, who was executed by Henry V, had married Anne de Mortimer, daughter of Roger Mortimer and sister of Edmund Mortimer. Anne's grandmother, Philippa of Clarence, was the daughter of Lionel of Antwerp. The Mortimers were the most powerful marcher family of the fourteenth century. G.M. Trevelyan has written that "the Wars of the Roses were to a large extent a quarrel between Welsh Marcher Lords, who were also great English nobles, closely related to the English throne." Anne de Mortimer had died