<< 7.One of two things will occur either your thief will be refused
admission and you'll have to go away and come back later and try again
or you oppenant having seen your army is much smaller than his own
will attack rush out of castle and fight your noble, poor sod,
meanwhile thief enters empty castle.
>>
This trick only works if the castle owner is foolish enough to leave it
unoccupied. It also assumes your army can arrive at the castle province in
one move without being seen--unlikely if your army is large enough to defend
the castle. Also, the defender is more likely to grab troops from his
garrison and crush your bait army.
--Agamemnon of the Red Company