The battle of Heilsberg (East Prussian town) was fought between French and Russian armies on June 10, 1807, four days before the decisive battle of Friedland, during the War of the Sixth Coalition in the Napoleonic Wars. The French under Marshals Murat and Lannes attacked Russian army under General Benigsen which hold the strong defensive positions within the town. Benigsen repeled several attacks resulting in huge French casualities, but had to withdraw towards Friedland next day.
