The Battle of Eylau was a bloody and strategically inconclusive battle on 7 and 8 February [O.S. 26 and 27 Jan.] 1807 between Napoleon's Grande Armée and the Imperial Russian Army under the command of General Levin August von Bennigsen near the town of Preussisch Eylau in East Prussia. Late in the battle, the Russians received timely reinforcements from a Prussian division of von L'Estocq. After 1945, the town was renamed Bagrationovsk as part of Kaliningrad Oblast, Russia. The engagement was fought during the War of the Fourth Coalition, part of the Napoleonic Wars.