The Yorkist lords returned from Calais and marched north. The Lancastrian army behind earthworks at Northampton was betrayed by Lord Grey of Ruthyn, who let the Yorkists in through his sector. The battle lasted under an hour in a thunderstorm that rendered Lancastrian artillery useless. The Duke of Buckingham, the Constable and the Treasurer were killed. Henry VI was found sitting helplessly in his tent and escorted to London.
c.300 killed including three senior Lancastrian lords
This battlefield is listed on the Register of Historic Battlefields — a national designation identifying Britain's most significant battle sites for protection and further research. Reference: EHB12.
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