To play the 100 Days Campaign

[LotB]

Hi,
for our fantasy Campaigns, we use the excellent regulation of Nick Lund "Fantasy Warriors Campaigns". We would like to try to use it also for the historical battles (WSS and Napoleonic).
The regulation provides a map divided into squares. We would like to try to draw one map on a A3 sheet (or two or three or more sheets) in order to play the 100 Days Campaign.
The regulation provides that a Force can move in a turn to the maximum of 3 squares, if it is in the best of conditions .
As a game Turn should correspond to a day, which scale should we use for the map? That is, the armies of the Napoleonic era, how many kilometers could walk at most in one day? And how many hours could they walk every day?
Many thanks

Sergio
Naran Team Turin