Henry back dated
his reign to the 21st
of August, to the day
before Bosworth.
This then allowed Henry to
consider men who fought for
Richard III on the battlefield
to be traitors.
The punishment for treason among
noblemen was attainment by an Act
of Attainder
Henry got to publicly reward his
loyal servants who fought for him
Knighted 11 men on the battlefield
Marrying Elizabeth of York
Those who supported Edward were
concerned how Richard was treating his
children (Princes in the Tower) and how
they had sought santuary to avoid
Richard, therefore this union brought
together Lancastrians and Yorkists in
an attempt to end the War of the Roses
Although Henry had his own claim to the throne, Elizabeth made it even
stronger, additionally, because she was from a Yorkist line of descent
and Henry was from the Lancastrian side, the two together fused the
houses together.
Henry repealed the Titulus Regius in 1485 to make Elizabeth, and
her siblings, legitimate. However, this causes the debate as to if
Henry was involved in the Princes in the Tower disappearance
because with the Titulus Regius repelled they had the greatest
claim to the throne, ultimately threatening Henry's power.