On 12 December the first Republican troops under
François-Joseph Westermann and
François Muller appeared at the gates of the city.
Henri de La Rochejaquelein and Talmont assembled 3,000 men, especially Chouans, and took on the Republicans. They managed to set a trap in the woods near Le Mans. Westermann's surprised cavalry had to pull back whereas Muller's division panicked and fled after the first shots fired. The Republican army was on the verge of being annihilated when
Jacques Louis François Delaistre de Tilly's
Army of the Coasts of Cherbourg arrived as reinforcements on the battle field. This time it was the Vendéens who panicked and fled and hid in the city. La Rochejaquelein thus re-entered the city, but his forces were dispersed, most of the Vendéens not even realizing the Republicans were so close, and some soldiers were even drunk. Some time later, General
François-Séverin Marceau arrived in turn at the battle and reassembled his troops at
Cérans-Foulletourte. He was followed by
Jean Baptiste Kléber and his troops of the
Army of Mainz. Marceau wished to wait for Kléber's troops to arrive before attacking but Westermann insisted and launched an attack, Marceau had to follow. The Republican army entered Le Mans by nightfall, overwhelmed all the Vendéen defences. The Vendéens were completely disorganized, chaos resulted in the city where all night long street skirmishes were taking place.
Henri de la Rochejaquelein, seeing that all was lost, sought only to protect the retreat towards Laval for the survivors. The Vendéens deployed 14 cannons at the gates of the city, managing to cover their retreat and stopping the Republicans. Yet thousands of Vendéens, most of them non-combatants, were stuck inside the town, having taken refuge in the houses. Groups of resisting Vendéen soldiers were spread across the city. They resisted for a long while, standing their ground until the end of the day. Nonetheless, they were eventually destroyed by the Republican artillery under General
François Carpentier, which opened fire on the buildings and houses from where shots were fired. The battle then turned into a massacre, with the wounded, women and children who had taken refuge in the houses being forced out and massacred. Kléber and Marceau tried to save the prisoners, but could not hold back their troops. Westermann assembled his
hussars and pursued the Vendéens. Those who were slow and fell behind were massacred, but the larger part of the Vendéen army, reduced to half on its strength, managed to reach
Laval on 14 December. The Republican cavalry, not daring to enter the
faubourgs, decided to head back. According to the
Committee of Public Safety, 2,000 to 5,000 Vendéens, both combatants and non-combatants, died in Le Mans, while Republican losses totaled only 30 dead and approximately 100 wounded. Adding to the Vendéen victims of the battle those killed south of Le Mans during the flight to Laval, the total deaths were approximately 15,000. ==References==