So there we go, Kaylin used the Mocking bird item in the previous page to message the Kings men to join the fight- the Mocking Bird sends a message, in the voice of the one you are thinking of if you have heard their voice before, to nearby characters and it can be filtered by known factions, allies, etc. But why call them anyways? Then again, why did the King not want them in the fight to begin with? Just to hog the experience for himself?