On 29 August, Vandamme, with 34,000 soldiers and 84 guns at his disposal, attacked Russian formations forming a rearguard for the retreating Coalition army, at 14,700 to 16,000 strong, under the command of Russian general Ostermann-Tolstoy. The situation was very dangerous for the allies; if Vandamme won the battle, the French would take the passes in the mountains, and the retreating Coalition army could be trapped by Napoleon. However, Ostermann-Tolstoy rallied all of his troops for a stiff defense; he was seriously wounded, losing his left hand, but was replaced by his
right-hand man,
Aleksei Petrovich Yermolov. By the end of the day the Allies had 20,000 men. All of Vandamme's attacks were repulsed, and his situation got worse on the next day. A Prussian army corps commanded by
Friedrich von Kleist attacked Vandamme's rearguard. Kleist then received help from a combined Russian and Austrian attack on his front, under the command of Generals
Mikhail Bogdanovich Barclay de Tolly and
von Colloredo-Mansfeld. In an attempt to repulse simultaneous attacks on his front and rear, Vandamme ordered his forces to form
squares. The inexperienced French troops were unable to fend off the allies, and soon withdrew from the battlefield, with heavy losses, including Vandamme himself as a captured prisoner of war. ==Casualties==