Étienne Tardif de Pommeroux de Bordesoulle's I Cavalry Corps led Marmont's advance. After obtaining local guides, the column left the main road at Jonchery-sur-Vesle and followed a route through Sapicourt to Rosnay. At Rosnay, they surprised several squadrons of Prussian cavalry which fled in a panic. One battalion of the 3rd Pommeranian Landwehr Regiment was at Rosny while a second battalion was at Muizon on the Vesle. The 5th Kurmärk Landwehr had one battalion at Gueux and a second one at Thillois. The battalion in Rosnay fell back fighting to Gueux and finally to Ormes. While defending themselves in the Ormes cemetery, the Prussians were overwhelmed by Pierre Pelleport's infantry brigade; many surrendered while others were cut down by the 10th Hussars and the 1st Gardes d'Honneur from Cyrille Simon Picquet's cavalry brigade. While he was inspecting a camp at Gueux, Jagow was surprised by French cavalry and galloped away on an unsaddled horse. Caught unaware as they cooked supper, many of the Prussians at Muizon and Thillois left their shoes and coats behind in their flight.