I thought Lasalle was for 'Divisional' games with 1 btn to a btn. I think Mustapha was going to do another set, Blucher [?], for bigger games. I might be wrong.
I don't know if you have a history of war gaming in this period (I don't, not really, though I've played a few games over the last 35+ years and, bizarrely, started there) but I think most of the rules were made for either small battles (12 or so units a side) or, to a lesser degree, huge battles (40+ units a side). Trying to find something somewhere in the middle for recreating big battles at reduced scale (20 - 30 units a side) doesn't seem to be catered for much (again, I might be wrong). Hopefully, someone will come up with a good suggestion for us - I don't plan on buying every rule set in the hope I stumble across the right one, given the numbers out there I couldn't afford to do anything else if I did that.