The Vendéens repelled an offensive by the Republicans against the town of Dol-de-Bretagne, then counterattacked and stormed Antrain, where the patriots' headquarters were located.

Meanwhile, a column of 4,000 men from Brest and commanded by General Auguste Joseph Tribout arrived in Dinan on 14 November, then moved to Pontorson.

Another column of 6,000 men from the Army of the Coasts of Cherbourg, led by Charles Guillaume Sepher, left Caen and headed towards Avranches.

On 20 November, Westermann advanced, recaptured Pontorson and massacred the wounded Vendeans remaining in the town, then he set out in pursuit of the stragglers on the road to Dol.

On 21 November, around 1 or 2 a.m., Westermann and Bouin de Marigny prematurely launched the attack on Dol-de-Bretagne, without respecting Kléber's plan.

At daybreak, Kléber and Rossignol arrived in turn with the bulk of the army, but they found the battalions already engaged in complete disorder.

For his part, La Rochejaquelein pushed Westermann back onto Pontorson, then he moved towards the Antrain road to come to the aid of Stofflet.

At the beginning of the 19th century, the author Pierre-Victor Berthre de Bourniseaux estimated the number of Republicans killed or wounded at 12,000, and Abbot Félix Deniau at nearly 10,000 to 12,000.