Emperor of the French Napoleon I, The Officer's Manual: Napoleon's Maxims of War
“ The duty of an advanced guard does not consist in advancing or retiring, but in manœuvring. An advanced guard should be composed of light cavalry, supported by a reserve of heavy cavalry, and by battalions of infantry, supported also by artillery. An advanced guard should consist of picked troops, and the general officers, officers and men, should be selected for their respective capabilities and knowledge. A corps deficient in instruction is only an embarrassment to an advanced guard. ”
