Q:Question: "What the office of his favorite outfit early on?"  Context: "When he became First Consul and later Emperor, Napoleon eschewed his general's uniform and habitually wore the simple green colonel uniform (non-Hussar) of a colonel of the Chasseur à Cheval of the Imperial Guard, the regiment that often served as his personal escort, with a large bicorne. He also habitually wore (usually on Sundays) the blue uniform of a colonel of the Imperial Guard Foot Grenadiers (blue with white facings and red cuffs). He also wore his Légion d'honneur star, medal and ribbon, and the Order of the Iron Crown decorations, white French-style culottes and white stockings. This was in contrast to the gorgeous and complex uniforms with many decorations of his marshals and those around him."  Answer:
A:
Chasseur à Cheval of the Imperial Guard