Republican battalion. Cathelineau himself was shot at the head of his forces, causing his men to lose heart and retreat; ultimately, the Vendeans were unable to take the city. In October 1793, in order to punish the Vendean prisoners taken after the failure of the siege of Nantes, Jean-Baptiste Carrier ordered them to be shot en masse. When this proved impractical, he had the prisoners rounded up and put out on the river Loire in boats equipped with trap-door bottoms; when these opened the victims were left to drown. On this occasion it was rumored that female prisoners were stripped and tied up with men before being sent to their deaths, the so-called Republican Marriage. Some later historians dispute this story as a counter-revolutionary myth. First Battle of Châtillon On 5 July 1793, the First Battle of Châtillon took place at Châtillon-sur-Sèvre near the commune of Mauléon. In that action, Marquis de la Rochejaquelein commanding 20,000 Vendean Royalists attacked a French Republican force led by General François Joseph Westermann. The Vendean Royalists were victorious, killing and wounding 5,000 French Republicans. Among those killed in the battle was French Republican General Chambon. Battle of Vihiers The Vendeans won a victory over the revolutionary army led by Santerre at the Battle of Vihiers on 18 July 1793. Battle of Luçon The Battle of Luçon was actually a series of three engagements fought over four weeks, the first on 15 July and the last on 14 August 1793, between Republican forces under Augustin Tuncq and Vendean forces. The engagement on 14 August, fought near the town of Luçon was actually the conclusion of three engagements between Maurice d'Elbée's Vendean insurgents and the Republican army. On 15 July, Claude Sandoz and a garrison of 800 had repulsed 5,000 insurgents led by d'Elbee; on 28 July, Tuncq drove off a second attempt; two weeks later, Tuncq and his 5,000 men routed 30,000 insurgents under the personal command of François de Charette. Battle of Montaigu The Battle of Montaigu was fought on 21 September 1793 when the Vendéens attacked general Jean-Michel Beysser's French Republican division. Taken by surprise, this division fought back but lost 400 men, including many captured. Some of these prisoners were summarily executed by the Vendeens and their bodies later found in the castle wells by troops under Jean-Baptiste Kléber. Second Battle of Tiffauges The Battle of Tiffauges was fought on 19 September