It seems to be the norm. British regiments had women on their rosters, and had to identify them on the monthly reports, including children. The British were allowed 4-8 women per company, supported by rations, depending on the year. The number actually went up, starting at four women. That means that a battalion would have had 40 women on campaign, or 400 for every ten battalions [a division?] The French, bless them, had several women per battalion, uniformed and not, as the norm.
And of course, that is not counting all the unsanctioned campfollowers and sutlers. Supposedly, Wellington's army in 1815 had ten thousand campfollowers on the march from Waterloo to Paris. I read where the Prussians were just as graced.
Best Regards,
Bill H.