G,
The rules allow for varying army and command capabilities, thus for instance, the Allied armies such as Austrian, Russian or say Spanish are usually not as efficient in skirmish combat, (though they can out do the French in certain circumstances). It is these armies that will generally not be as well commanded as say a French, British or Late Prussian command, but again it can vary. Generals are graded according to their command ability and optional rules cover brigadier quality and each army has a number of bespoke rules that can be used if players wish.
DB