Auerstedt [ˈaʊ̯ɐ.ʃtɛt] is a village and a former municipality in the Weimarer Land district of Thuringia, Germany. Since 31 December 2012, it is part of the town Bad Sulza. It lies 25 miles (40 km) northeast of Weimar. On October 14, 1806, the Battle of Jena-Auerstedt, a decisive victory for Napoleon I of France, took place near Auerstedt. As a result, the leader of the victorious French forces, Louis-Nicolas Davout, was appointed Duc d'Auerstaedt.