The Siege of London was an episode of the Wars of the Roses between 12 and 15 May 1471, in which adherents of the House of Lancaster commanded by Thomas Neville unsuccessfully attempted to storm the city and free King Henry VI, who had been imprisoned in the Tower of London by his rival Edward IV of the House of York. This confrontation, which was an epilogue to the recent battles of Barnet and Tewkesbury, completed the final restoration of Edward IV and ensured the Yorkist hold on the throne.