Napoleon smashes a Prussian army contingent led by Frederick Louis, Prince of Hohenlohe-Ingelfingen and Ernst von Rüchel at Jena on October 14, while ...

...at Auerstedt a single French corps defeats the bulk of the Prussian army, despite being heavily outnumbered.

Victory at Auerstedt had been all but secured once the Duke of Brunswick (as well as fellow commander Friedrich Wilhelm Carl von Schmettau) was mortally wounded, and the Prussian command had devolved to the less able King.

Matters had worsened once the vanquished remnants of the Prussian army from Jena stumbled onto the clash at Auerstedt, further plunging the Prussians' morale and triggering their precipitous retreat.

For this conspicuous victory, Marshal Davout will later be created the Duke of Auerstedt by Napoleon.