(Late) (Roman) Formations

[Aryaman2]

To Aryaman2 ;
My view on cavalry charging head-on into steady infantry is not based on'English historiography', nor on just Napoleonic sources.Eylau belongs in the 'exception' category - an attack in a snowstorm by cavalry in column, and what happened is debatable anyway.
I don't agree that Keegan's views are dependant on numbers - his description and explanation of what occurred are just as valid whatever the number of the French ( again debatable, and of course there is a huge difference between 'those present' and 'those taking part' )

Eylau is as debatable as any other battle, there is no perfect laboratory experiment in which in average conditions an unmodified, steady infantry deployed in square (because I imagine you would agree that there is no doubt that infantry in line was regularly beaten by cavalry) was charged by an unmodified cavalry with similar characteristics. However there are plenty of examples in many different conditions in which steady infantry has been defeated by cavalry.
Well, I will not start another discussion in this thread, but if you are interested there was a long discussion in another thread on the subject you can find interesting.
On Keegan and Agincourt, you yourself validated the view it was dependant on numbers when you talked about "small group dynamics and crowd behaviour"