Despite his decisive victories over Austria and Russia at Austerlitz in 1805 and over Prussia at the twin battles of Jena-Auerstedt in 1806, Napoleon Bonaparte wasn't able to end the war. In 1807 a new Russian army under the generals Bennigsen, Barclay de Tolly and Bagration supported by the Prussian forces of L'Estocq challenged the emperor and his marshals Ney, Davout, Murat, Augereau, Soult at the battle of Eylau during the War of the Fourth Coalition.