The river crossed during Napoleon’s catastrophic retreat from Russia was the Berezina.
The Battle of Berezina took place from 26 to 29 November 1812 in present-day Belarus. Napoleon’s Grande Armée had abandoned Moscow and was retreating west through increasingly harsh conditions. Russian forces threatened to trap the remnants against the river, whose broken ice, swampy banks, and destroyed bridge made a crossing extraordinarily dangerous.
French engineers built two pontoon bridges near Studienka. One carried troops and the other was intended for artillery and vehicles, but both were fragile and one collapsed repeatedly. Fighting on both banks allowed much of the organized army to escape, but thousands of stragglers were killed, captured, or drowned amid panic on the final day.
The battle was tactically costly for the French, yet Napoleon avoided total destruction and continued toward Poland. “Crossing the Berezina” therefore became a byword for desperate survival rather than a straightforward French victory. It is sometimes described as a defeat, but the battle’s immediate strategic outcome was Napoleon’s escape with a surviving core of veterans.