Still in Lefebvre's division, the 25th Light fought at the Battle of Ostrach on 21 March 1799 and the Battle of Stockach on 25 March. The 25th Light was in the 3rd Division at the First Battle of Zurich on 4 June 1799. Brunet was promoted general of brigade on 10 June 1799. He led a brigade in Édouard Mortier's 4th Division at the Second Battle of Zurich on 25–26 September 1799. The division consisted of the 50th, 53rd, 100th and 108th Line Infantry Demi-brigades, the 1st Dragoons and the 8th Chasseurs à Cheval. He assumed the rank of general of division on 7 June 1802.