Edward of Westminster (13 October 1453 – 4 May 1471), also known as Edward of Lancaster, was the only son of King Henry VI of England and Margaret of Anjou. He was killed at the Battle of Tewkesbury, making him the only heir apparent to the English throne ever to die in battle....LESS
Warwick returned to England and deposed Edward IV, with the help of Edward IV's younger brother, the Duke of Clarence. from Edward of Westminster, Prince of Wales
King Louis XI of France wanted to start a war with Burgundy, allies of the Yorkist King Edward IV. from Edward of Westminster, Prince of Wales
Henry VI rewarded Clarence by making him next in line to the throne after his own son, justifying the exclusion of Edward IV either by attainder for his treason against Henry VI or on the grounds of his alleged illegitimacy. from George Plantagenet, 1st Duke of Clarence
Edward IV (28 April 1442 – 9 April 1483) was the King of England from 4 March 1461 until 3 October 1470, and again from 11 April 1471 until his death in 1483. He was the first Yorkist King of England. The first half of his rule was marred by the violence associated with the Wars of the Roses, but he overcame the Lancastrian challenge to the throne at Tewkesbury in 1471 to reign in peace until his sudden death. Before becoming king, he was 4th Duke of York, 7th Earl of March, 5th Earl of Cambridge and 9th Earl of Ulster. He was also the 65th Knight of the Order of the Golden Fleece.