The House of York
The House of York is represented by a white rose, three of the members became king in the late 15th century. The Kings were: Edward V, Richard lll, and Edward IV.
King Henry VI VS. King Edward IV
King Henry VI had a good claim to his throne but was not a good warrior, he lost the Hundred Years War. After the loss he allowed England to fall into Lawlessness and criminality.
King Edward IV took the throne from King Henry VI in 1461, he was an inspiring military leader, his family believed King Henry VI was not fit to be king. King Edward IV won great battles and never lost a battle on English soil. He was a wise and capable king.
Is King Edward lll guilty?
Some evidence could prove that he is guilty such as the fact that the two princes he was said to have murdered were never seen again after being locked up in a tower, also 200 years later they found 2 bodies under the stairs in the tower.
But he may also not be guilty because he was known to be a loyal brother and charming, also the story of him being a murderer could've been made up by his enemies who disliked him.
Battle of Bosworth Field
Richard lll and Henry Tudor fought, Henry Tudor won the battle and then married into the York line. Richard lll was killed in the battle by a blow to the head with an ax.