Fergus of Galloway married to David's older sister, Edith (died 1118), a union which closely bound him to the Scottish royal house. For as long as Henry I lived, relations between him and David remained harmonious. When the former died in 1135, however, the peace between the neighbouring realms was shattered when his nephew, Stephen of Blois, Count of Boulogne and Mortain (died 1154), successfully seized the throne. Before the end of the year, the Scots surged forth and seized Carlisle and Cumberland before peace was restored. Relations broke down the following year, and the Scots again invaded in 1137, seizing Northumberland, and
Wars of the Roses reigned for 78 days as Edward V, but was then deposed by his uncle, who became Richard III. The final victory went to a relative and claimant of the Lancastrian party, Henry Tudor, son of Henry VI's half-brother Edmund Earl of Richmond, who defeated Richard III at the Battle of Bosworth Field. After assuming the throne as Henry VII, he married Elizabeth of York, the eldest daughter and heir of Edward IV, thereby uniting the two claims. The House of Tudor ruled the Kingdom of England until 1603, with the death of Elizabeth I, granddaughter of Henry VII and Elizabeth