By 1469, Warwick had formed an alliance with Edward's jealous and treacherous brother George, who married Isabel Neville in defiance of Edward's wishes in Calais.
I 1469 indgik Warwick en alliance med Edvards jaloux og forræderiske bror Georg, der stik imod Edvards ønske indgik ægteskab med Isabel Neville i Calais.