As Alexandre de Beauharnais pointed out, the terms did not exclude the garrison from fighting against Vendean rebels. Soon 14,000 veteran soldiers of the so-called "Army of Mainz" under Jean-Baptiste Annibal Aubert du Bayet were on the march for the Vendée. In early September the reinforcements joined Canclaux at Nantes. The Republican generals and representatives agreed to mount a converging attack on the Vendée with the main thrust coming from Nantes. However, Rossignol failed to cooperate, ordering the "Luçon" and "Fontenay" Divisions to retreat. Consequently, with Royrand's army watching the quiet southern sector, the other Vendean armies concentrated against the remaining Republican columns. On 18 September, Santerre's "Saumur" Division marched into an ambush in the Battle of Coron and was routed. Canclaux's offensive made progress at first but his columns were beaten at the Battle of Tiffauges on 19 September and the Battle of Montaigu three days later. The "Sables-d'Olonne" Division was smashed by Charette at the Battle of Saint-Fulgent. Canclaux and Rossignol mounted a new offensive resulting in a success at the Battle of Saint-Symphorien on 6 October, but their earlier defeats and the conniving of the radical Charles-Philippe Ronsin brought about a reshuffling of Republican commanders in early October. Canclaux and Du Bayet were dismissed, Rossignol was transferred to lead a weakened "Army of the Coasts of Brest" and a new force, the "Army of the West" was placed under Jean Léchelle. The new army absorbed the "Army of the Coasts of La Rochelle", Canclaux's troops at Nantes and the "Army of Mainz". At this time, the Vendean leaders failed to cooperate effectively. Charette became preoccupied with capturing Noirmoutier on the coast. In the east, the "Saumur", "Thouars" and "Fontenay" Divisions united at Bressuire under Chalbos and Westermann and moved west. The "Luçon" and "Sables-d'Olonne" Divisions were ordered north to join Léchelle's main Republican army near Tiffauges. As the "Luçon" Division advanced, it captured Les Herbiers from 3,000 rebels under Royrand.