oleon's army passed to the north of the Austrian army. Marshal Jean-Baptiste Bernadotte's I Corps, General of Division Auguste Marmont's II Corps, Marshal Louis Davout's III Corps, Marshal Nicolas Soult's IV Corps, and Marshal Ney's VI Corps wheeled east, then southeast, then south. On 5 October, Kienmayer reported that the French were in Ansbach, to the north of the Danube. Two days later, the French crossed the Danube on a broad front, moving south. At this time Mack's army was divided into four corps. Jella?i? had 15,000 troops in 16 infantry battalions, six Jäger companies, and six cavalry squadrons to the south of Ulm. Feldmarschall-Leutnant Karl Philipp, Prince of Schwarzenberg commanded 28 battalions and 30 squadrons at Ulm. Feldmarschall-Leutnant Franz von Werneck had 30 battalions and 24 squadrons near Günzburg. Kienmayer's command near Ingolstadt consisted of 19 battalions and 34 squadrons. Unwisely, Mack decided to defend Ulm, instead of trying to escape the approaching French army. Mack reacted by sending Feldmarschall-Leutnant Franz Xavier Auffenberg with only 6,000 men to stop the French. Murat and Lannes crushed the hapless Auffenberg at the Battle of Wertingen, inflicting losses of 400 killed and wounded on the Austrians and capturing 2,900 soldiers and six cannons. The next day, General of Division Jean-Pierre Firmin Malher's VI corps division attacked General-Major Konstantin Ghilian Karl d'Aspré's 7,000 troops in the Battle of Gün