The twin battles of Jena and Auerstedt, both fought on 14 October 1806, marked a major turning point in the Napoleonic Wars (1803-1815). It saw the French Grande Armée, led by Emperor Napoleon I (r. 1804-1814; 1815) soundly defeat the Prussian army of King Frederick William III (r. 1797-1840). The battles resulted in Prussia's subjugation to the First French Empire. #History #BattleOfAuerstedt #BattleOfJena #GrandeArmee #HistoryFacts https://www.worldhistory.org/article/2256/battle-of-jena-auerstedt/