Lasalle went into immediate action at the Battle of Austerlitz, with the 1st Dragoon Division, under the command of Divisional General Louis Klein, in the Cavalry Reserve of Marshal Joachim Murat.
Because of his successes on the field, he was given command of a Light Cavalry Brigade consisting of the 5th and 7th Hussar Regiments, also under the command of Marshal Murat.
Lasalle's star was high during the 1806 campaign for Prussia, where his hussars became known as the "Brigade Infernale" ("Hellish Brigade"), with Colonels François Xavier de Schwarz and Ferdinand-Daniel Marx as his regimental commanders.

He then fought at Schleiz and Jena-Auerstedt, where he captured the King of Prussia's bodyguard and forced the Prince of Hohenlohe to retreat.
On 26 October 1806, Lasalle was in pursuit of Hohenlohe when he observed Prussian infantry northwest of his position, at the edge of the forest, near Zehdenick.
Unconcerned about the enemy's huge numerical superiority, he charged.
After fierce fighting, the Prussians managed to beat back Lasalle's hussars until cavalry reinforcements arrived.
General Grouchy arrived at about the same time and the combined attacks destroyed the Prussian cavalry.
The Prussian infantry moved into the woods and then withdrew.

On 28 October, as they approached Prenzlau, they realized the Prussian Army had been inside the city for some time.
Marshal Murat arrived at 10 a.m. and ordered Lasalle to cut the road from Gustow and to storm the northern gates of the city.
Lasalle took his troopers right up to the city gates and burst them open.
He continued on through the city and out the east gates where he could see Hohenlohe's army forming in a plain north east of the city.
Lasalle went into immediate action at the Battle of Austerlitz, with the 1st Dragoon Division, under the command of Divisional General Louis Klein, in the Cavalry Reserve of Marshal Joachim Murat. Because of his successes on the field, he was given command of a Light Cavalry Brigade consisting of the 5th and 7th Hussar Regiments, also under the command of Marshal Murat. Lasalle's star was high during the 1806 campaign for Prussia, where his hussars became known as the "Brigade Infernale" ("Hellish Brigade"), with Colonels François Xavier de Schwarz and Ferdinand-Daniel Marx as his regimental commanders.
He then fought at Schleiz and Jena-Auerstedt, where he captured the King of Prussia's bodyguard and forced the Prince of Hohenlohe to retreat. On 26 October 1806, Lasalle was in pursuit of Hohenlohe when he observed Prussian infantry northwest of his position, at the edge of the forest, near Zehdenick. Unconcerned about the enemy's huge numerical superiority, he charged. After fierce fighting, the Prussians managed to beat back Lasalle's hussars until cavalry reinforcements arrived. General Grouchy arrived at about the same time and the combined attacks destroyed the Prussian cavalry. The Prussian infantry moved into the woods and then withdrew.
On 28 October, as they approached Prenzlau, they realized the Prussian Army had been inside the city for some time. Marshal Murat arrived at 10 a.m. and ordered Lasalle to cut the road from Gustow and to storm the northern gates of the city. Lasalle took his troopers right up to the city gates and burst them open. He continued on through the city and out the east gates where he could see Hohenlohe's army forming in a plain north east of the city.
Antoine Charles Louis de Lasalle