In the "third war" of 1569 the defeat and death of the Prince of Condé at the Battle of Jarnac left Coligny the sole leader of the Protestant armies. Victorious at the Battle of La Roche-l'Abeille, but defeated in the Battle of Moncontour on 3 October, he entered into the negotiations for what became the Peace of Saint-Germain (1570). Marrying Jacqueline de Montbel d'Entremont, and returning to court in 1571, he grew rapidly in favour with Charles IX, becoming a close mentor to the weak, easily manipulated King.