Napoleon's military genius was on full display as his French army clashed with Prussia's forces in a dual battle that would go down in history. While Napoleon's troops battled Prussian forces under King Frederick William III at Jena, Marshal Louis-Nicolas Davout's corps simultaneously engaged the Prussian army at Auerstedt. Despite being outnumbered, Napoleon's tactical brilliance and clever use of reserves led to a crushing defeat for the Prussians, shattering their army and paving the way for French occupation of Prussia.