The Battle of Heilsberg took place on 10 June [O.S. 29 May] 1807 off the town of Heilsberg (now Lidzbark Warmiński), during the Napoleonic Wars. In it, Joachim Murat's French troops began the offensive on Leonty (Levin) Bennigsen's Russian force ahead of schedule. The opponents fought until nightfall, by which time the French attacks had produced no results. They concluded an operational armistice. Napoleon, French supreme commander, intended to bring up more forces and continue the encounter, but Bennigsen eluded this, heading towards Königsberg. Due to Bennigsen's illness, corps-level commander Andrei Gorchakov temporarily replaced him during the action until the very end of it. Napoleon also arrived on the battlefield, but it was Murat who initiated the battle.
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