Drill (which we now admire of the parade ground of Whitehall on the Queen`s Birthday parade) was once the spectrum of tactical battlefield manouevers, which - correctly used - ensured success in battle, optimising the characteristics of the smooth-bore, muzzle-loading musket, as used from the XVIII Century to the Crimean war.
Thanks to the efforts of the Old Dessauer, the Prussian line infantry were supreme in the 7 YW. Their drill regulations were adopted by many smaller German states and in 1788 Sir David Dundas (`Old Pivot`) introduced them into the British army as the `Principles of Military Movement`.
In so doing, he totally ignored all the vital tactical experiences, learned at such great cost by the British army, fighting against the French and their Indian allies in the wildernesses of north America.
After the War of American Independence, those infantry officers returning to serve in the Prussian army of the day were similarly told to forget their skirmishing experiences.
The French army must have been commanded by generals every bit as obtuse as those in Whitehall and Potsdam, for they failed completely to pick up on the tactical possibilities of rifled firearms, so I assume that they were also utterly resistant to learning from the experiences of their commanders in those conflicts.
Does anyone have any examples of such attempted tactical revisions in the French high command?