Rubuta ci gaba ga wannan sakin layi - Colbert ya bar Junot a 1805 kuma ya bi Manjo Janar Maréchal Berthier a matsayin mai taimaka masa. Ya taimaka a Austerlitz
, inda aka ji masa rauni kuma ya zama shugaba d'escadron. Ya yi yaƙi da ƙarfin hali a Iena da Pułtusk. A cikin 1807 an sanya shi Kanar kuma shugaban tsohuwar rundunarsa, 7th Hussars. Wannan rukunin yanzu ya zama wani ɓangare na Lassalle ta Brigade, wanda ake kira "Infernal" brigade saboda sha'awarsa. Napoleon ya sanya shi jarumi na Légion d'honneur a 1808 kuma baron de Chabanais et de l'Empire a 1809