Answer
At the Battle of Eylau, fought in 1807 during the Napoleonic Wars, French Marshal Joachim Murat led a famed massed cavalry charge against the Russian forces. Comprising some 10,000 horsemen, Murat's audacious assault aimed to break through the Russian lines and scatter their formations. Despite initial successes, the charge ultimately proved costly, with heavy losses sustained by the French cavalry against fierce resistance from the Russian troops.