Was messing around in the default_heroes.txt & found that the date you enter is the date the general is "born" so he matures 16 years after that date
Lord Of Storms 16:42 22/06/03
I found this out also I figured it at 20 yrs, so my current Mod campaign starts in 1687 so I put the date for the GENERAL at 1666 so he will show up 1 yr. into my campaign, and it works fine.
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