I don’t know what EAM is ...
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Emergency Action Message.
#4413 reads to me like a call to arms.
#4414 reads to me like an ‘if - then’ set of pre-planned responses.
If this, then do as planned Red#.
Like a distributed warning order to prepare and final go order on plan as set.
Castle_Rock, in both those drops reads to me as go-order code phrase.
It may well be that some of the mil comms for orders distribution may be compromised. So broadcast it on the board where the people concerned keep watch for such.
Castle has historically referred to WH ... At least one time there was CASTLE_LOCK ... this time CASTLE_ROCK.