Complex sentence: He was created "Chevalier" of Saint-Louis, on 20 August of that year, and he was appointed Inspector General of Infantry, 3 January 1815, he went in that capacity in Marseille.
Split into simpler sentences: He was created "Chevalier" of Saint-Louis, on 20 August of that year, and he was appointed Inspector General of Infantry. On 3 January 1815, he went in that capacity in Marseille.