In November, the corps of Lannes, Augereau, and Marshal Louis-Nicolas Davout thrust into Prussian Poland. In late December, Napoleon launched an offensive against the Russian Empire armies that were gathering against him. At the Battle of Czarnowo on 23 and 24 December, the French pressed their enemies back. Also on the 24th, Augereau directed his two divisions to force a crossing of the Wkra River in the face of nine Russian infantry battalions and five cavalry squadrons under Michael Andreas Barclay de Tolly. Heudelet's attack at Sochocin was repulsed by three battalions. Furious at this setback, he ordered a second attack which only resulted in more casualties. At Kołoząb, Desjardin ordered the 16th Light to line the west bank of the river to give covering fire while the grenadier company of the 14th Line stormed the incompletely demolished bridge. Securing a foothold, the grenadiers were rapidly reinforced and repelled counterattacks by Russian infantry and hussars. Aided by Lapisse's task force which crossed downstream, Desjardin's men drove off the Russians and captured six cannons. Augereau lost 66 men killed and 452 wounded in these two actions.