The answer was the Battle of Borodino

Map of the Battle of Borodino — Map: United States Military Academy Department of History, Public domain, via Wikimedia Commons.

Year: 1812
Where: Borodino, Russia, Russia
War: French Revolutionary and Napoleonic Wars
Sides: First French Empire, Duchy of Warsaw and Kingdom of Italy vs Russian Empire
Troops: about 261,500
Casualties: about 82,500

The Battle of Borodino or the Battle of the Moskva took place on the outskirts of Moscow near the village of Borodino on 7 September 1812, during Napoleon's invasion of Russia. The Grande Armée fought against the Imperial Russian Army.

From Wikipedia, under CC BY-SA.

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