In 1621, Louis XIII moved to eradicate what he considered an open rebellion against his power. He led an army to the south, first succeeding in capturing the Huguenot city of Saumur, and then succeeding in the siege of Saint-Jean-d'Angély against Rohan's brother Benjamin de Rohan, duc de Soubise on 24 June. A small number of troops attempted to surround La Rochelle under the Count of Soissons in the Blockade of La Rochelle, but Louis XIII then moved south to Montauban, where he exhausted his troops in the Siege of Montauban.