Ivan Sergeyevich Leontiev (2 March 1782–2 August 1824) was an Imperial Russian general who fought in the Napoleonic Wars. In December 1812 he was promoted to major general and made commander of the 1st Brigade of the 2nd Cuirassier Division under Baron Duka and fought at the battles of Lützen and Bautzen.
See also List of Russian commanders in the Patriotic War of 1812
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