Following these events, Louis XIII and his Chief Minister Cardinal Richelieu declared the suppression of the Huguenot revolt the first priority of the kingdom. The English came to the support of La Rochelle, starting the Anglo-French War, by sending a major expedition under the Duke of Buckingham. The expedition however ended in a fiasco for England with the Siege of Saint-Martin-de-Ré. Meanwhile, cannon shots were exchanged on 10 September 1627 between La Rochelle and Royal troops. This resulted in the Siege of La Rochelle in which Cardinal Richelieu blockaded the city for 14 months, until the city surrendered and lost its mayor and its privileges.