The Protestant army laid siege to several cities in the Poitou and Saintonge regions (to protect La Rochelle), and then Angoulême and Cognac. At the Battle of Jarnac (16 March 1569), the prince of Condé was killed, forcing Admiral de Coligny to take command of the Protestant forces, nominally on behalf of Condé's 15-year-old son, Henry, and the 16-year-old Henry of Navarre, who were presented by Jeanne d'Albret as the legitimate leaders of the Huguenot cause against royal authority. The Battle of La Roche-l'Abeille was a nominal victory for the Huguenots, but they were unable to seize control of Poitiers and were soundly defeated at the Battle of Moncontour (30 October 1569). Coligny and his troops retreated to the south-west and regrouped with Gabriel, comte de Montgomery, and in spring of 1570, they pillaged Toulouse, cut a path through the south of France, and went up the Rhone valley up to La Charité-sur-Loire. The staggering royal debt and Charles IX's desire to seek a peaceful solution led to the Peace of Saint-Germain-en-Laye (8 August 1570), negotiated by Jeanne d'Albret, which once more allowed some concessions to the Huguenots.