The Battle of Friedland (June 14, 1807) was a major confrontation of the Napoleonic Wars between the armies of the French Empire commanded by Napoleon I and the armies of the Russian Empire led by Count von Bennigsen. The battlefield is located in modern-day Kaliningrad Oblast, near the town of Pravdinsk, Russia. Napoleon and the French obtained a decisive victory that routed much of the Russian army, which retreated chaotically over the Alle River by the end of the fighting. The engagement at Friedland was a strategic necessity after the Battle of Eylau earlier in 1807 had failed to yield a decisive verdict for either side. The battle began when Bennigsen noticed the seemingly isolated corps of Marshal Lannes at the town of Friedland. Thinking he had a good chance of destroying these isolated French units, Bennigsen ordered his entire army over the Alle River. Lannes held his ground against determined Russian attacks until Napoleon could bring additional forces onto the field. By late afternoon, the French had amassed a force of 80,000 troops on the battlefield. Relying on his superior numbers, Napoleon concluded that the moment had come and ordered a massive assault against the Russian left flank, hoping to roll up the Russian army and press them against the river behind. Unable to withstand the pressure, the Russians broke and started escaping across the Alle, where many died from drowning.