What about 27 April 1809: the regiment was the 18e Léger (I and II Battalions only) and Chef de Bataillon Jardet was captured with 150-200 men.
See: Thunder on the Danube, vol. III, p. 108; Pisani, p. 310 [http://gallica.bnf.fr/ark:/12148/bpt6k503966z/f347.image.r=Obrovac%20.langEN]; Duroisel, Résume de l'Historique du 93e etc., 1891, p. 77.