Date and place
- October 15th to 20th at Ulm, Baden-Württemberg, on the border with Bavaria.
- French Army (80 000 men), under emperor Napoleon Ist.
- Austrian Army (40 000 men), under Prince Johann I Joseph of Liechtenstein and general Karl Mack von Leiberich.
Casualties and losses
- French Army : 500 men dead, 1 000 wounded
- Austrian Army : 4 000 dead, 25 000 prisoners
On October 15, 1805, following a request for surrender addressed to the Austrians and left unanswered, Napoleon took the offensive around 2:30 p.m. by sending General Henri-Gatien Bertrand then General Jean-Pierre Firmin Malher (VIth Corps), who managed to take the heights of Michelsberg [48.41168, 9.98326], north-northwest of Ulm:
At the same time, General Louis-Gabriel Suchet attacks the Frauensberg [48.41173, 9.98812], very close, to the north.
The next day, Napoleon decides not to attack the city while Karl Mack von Leiberich , is stalling while waiting for the next arrival of the Russians. However, fearing the lack of food and after a short bombardment, he yielded and negotiated with Napoleon the conditions of a surrender, which took place on October 20.