Therefore, one should never admit a garrison larger than one's own forces,
especially when composed of barbarians.
-- Polybios, writing in the mid-2nd century BC (paraphrased), after an
account of the betrayal of Epeiros by its mercenary Gallic garrison to a
passing fleet of Illyrian pirates. Barbarians, of course, in the original
sense of non-Greeks; non-Arabs or non-Muslims perhaps, in the Saudi
case. -- Duncan Head