The Mormant-Valjouan actions and the Battle of Montereau the following day marked the start of a French counteroffensive intended to drive back Karl Philipp, Prince of Schwarzenberg's Allied Army of Bohemia.
They soon conceived a plan in which the main army under the Austrian Field Marshal Schwarzenberg advanced toward Paris via Troyes.
Simultaneously, Prussian Field Marshal Gebhard Leberecht von Blücher's army took a more northerly route along the Marne River toward Meaux.
[3] When Napoleon realized that Blücher represented the more serious threat on 6 February, he began to shift his strength northward in order to deal with the Prussian field marshal.
Leaving Marshals Victor and Nicolas Oudinot with 34,000 men to hold off Schwarzenberg's much larger army, Napoleon headed north on 9 February with 30,000 troops.
On 10 February in the Battle of Champaubert, the French army fell on Zakhar Dmitrievich Olsufiev's corps, which numbered only 4,000 infantry and 24 guns.
[8] While Napoleon was drubbing Blücher, Schwarzenberg's main army pushed back the forces of Marshals Victor and Oudinot.
[10] Leaving Marshals Auguste de Marmont and Édouard Mortier to watch Blücher, Napoleon rapidly transferred his strength southward against Schwarzenberg's army.
[15] Instead of obeying, Wittgenstein aggressively pushed his corps west beyond Provins toward Nangis while his advanced guard under Pahlen reached Mormant.
Bianchi's corps was south of the Seine between Moret-sur-Loing and Villeneuve-la-Guyard with advance guards farther west in Fontainebleau.
During the night, Wittgenstein received positive orders to withdraw so he marched his corps east toward Provins at dawn.
[21] Another source stated that the Grodno rather than the Olviopol Hussars were engaged, that the 20th and 21st Jägers were involved and that the Russians had 12 field pieces.
[21] Jacques Gervais, baron Subervie's brigade of Pire's division turned half-right and swooped down on the Russian skirmishers while the rest of Milhaud's cavalry advanced on Rüdiger's horsemen.
Pierre Ismert, leading one of Trelliard's brigades, hurled the 4th Dragoons at the fleeing Russians, forcing many to surrender.
When the Illowaiski and Rebrikov Cossacks tried to intervene they were swept away by Lhéritier's second brigade led by Jean Antoine de Collaert.
As Lhéritier's horsemen galloped after the routed Cossacks, the 16th Dragoons of Trelliard's division charged and broke a Russian square.
Successive charges by Piré and Montelégier broke Rüdiger's squadrons and chased them off the battlefield with the French light cavalry in pursuit.
Milhaud directed Montelégier to deal with the Russian infantry while sending Ludot on a sweep to block Pahlen's escape route.
Antoine Drouot aggressively pushed 36 guns from the French Guard artillery into the front line where they pummeled the Russians.
On the outskirts of Grandpuits they were finally brought to halt by Ludot's brigade which was now blocking the Russian line of retreat.
[26] The left-most column under Oudinot, with the VII Corps and Trelliard's dragoons, followed Wittgenstein's retreat east toward Provins.
MacDonald's center column consisted of the XI Corps, Piré light horsemen and Briche's dragoons; it headed southeast toward Donnemarie.
Tipped off by Hardegg's survivors, Peter de Lamotte deployed the 3rd Bavarian Division on the Valjouan heights, blocking the road.
Lamotte posted the 11th Bavarian Line Infantry in an advanced position at Villeneuve and Grand-Maison farm; his cavalry covered both flanks.
Gérard, whose troops led the infantry column, decided to attack at once and asked Victor for help from the II Corps.
[25] At some point during the withdrawal, the two Austrian mounted regiments were attacked by a large force of French cavalry and suffered 200 casualties in the melee.
One historian estimated that the French sustained 800 casualties while the Allies lost 3,000 men and 14 guns at Mormant and Valjouan.