In the first clash on 9 October 1806, a Prussian division was brushed aside in the Battle of Schleiz. The following day, Marshal Lannes crushed a Prussian division at Saalfeld, where the popular Prince Louis Ferdinand was killed. At the double Battle of Jena-Auerstedt on 14 October, Napoleon smashed a Prussian army led by Frederick Louis, Prince of Hohenlohe-Ingelfingen and Ernst von Rüchel at Jena, while his Marshal Louis-Nicolas Davout routed Charles William Ferdinand, Duke of Brunswick's main army at Auerstedt. At Jena, Napoleon fought only a contingent of the Prussian army. At Auerstedt a single French corps defeated the bulk of the Prussian army, despite being heavily outnumbered. Victory at Auerstedt was all but secured once the Duke of Brunswick (as well as fellow commander Friedrich Wilhelm Carl von Schmettau) were mortally wounded, and the Prussian command devolved to the less able King. Matters were 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 was later created the "Duke of Auerstedt" by Napoleon. On 17 October, Marshal Jean-Baptiste Bernadotte (redeeming himself somewhat for his inexplicable absence from either battle on the 14th) mauled Eugene Frederick Henry, Duke of Württemberg's previously untouched Reserve corps at the Battle of Halle and chased it across the Elbe River.