VVD0D95
Banned
Henry VI kills himself during attack of madness in 1454 (jumps out of window, eats broken glass or something like this). His infant son succeedes the throne as Edward IV so instead of mad king on the throne there is child king and long regency of Richard of York. Downfall of House of Lancaster and War of Roses is avoided. Perhaps Edward IV Lancaster marries heiress of Burgundy one day and Burgundian inheritance is added to Lancastrian realm.
You don't think Richard, Duke of York would attempt to have Edward marry one of his own children if they're of the right age?