Possibly they even succeeded... They made Fazzur reveal the whereabouts of Sheng Seleris to them, admittedly at that time a totally useless (and with the removal of Hofstaring Treeleaper, costly) information. They took peace instead of continuing combat.
If holing up there was a means to get the army out without a massacre, it succeeded very well. If they tried to restore the Principality, they failed.
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