AUERSTÄDT, ou'ẽr-stĕt. A village in Saxony, 25 miles northeast of Weimar. Here Davout won a great victory over the Prussians under the Duke of Brunswick on the same day (October 14, 1806) that Napoleon defeated their main army at Jena. The battle was fought in a mist, between 48,000 Prussians and 30,000 French. The Prussians lost one-half of their army, while Davout's loss amounted to 7,000 men. Consult Lettow-Vorbeck, Der Krieg von 1806 und 1807, Vol I., Jena und Auerstädt (Berlin, 1891).