HireMercenaries

I'm wondering whether any file has a trigger that uses the HireMercenary event.

Asking this because I noticed very rarely but consistently that some rather loyal and chivalrous generals seem to lose a point in each when hiring mercs.

I haven't been able to figure out whether they got a trait decrease somewhere or not, but what I do know is that its not controlled by either the character_traits not the ancillaries file.

I only know of the mercenary captain ancillary to use it. Never seen any loyalty drop or something, either, but that doesn't mean it isn't there...

The merc captain isn't the cause from what I know as even characters with that ancillary seemed to experience it random at times.
Only ever happened to chivalrous characters too