I don't think
Polyaenus' excerpt of 4.2.8 was necessarily a doublet of
Frontinus' similar one at all (both of them would not tell us of both ruses, presumably, as they would be in the same chapter of the same figure, and that would be redundant), not because it would be below a member of the 'stratagem genre' (including the likes of
Hermogenes of Smyrna) to concoct and prevaricate, but because the successful ruse
Polyaenus describes is the very reason the 10,000 or discontinued guarding the Gravia Pass and became 'relaxed' (it is specified
Philip could certainly not force the pass with this enemy in its holding position, and no other reason would compel
Chares to withdraw other than believing the Macedonians were heading north to deal with what was ostensibly a more important matter); there would have been pickets, etc., (in whatever cruder form than what a modern army may have exercised) in a proximate area north of the entrance to the pass, and
Philip arranged, based merely five or so miles north of these presumed pickets, in a manner making the false information believable (including its interception; spies, bribes, 'agents' posing as turncoats, etc.), and for them to receive the false 'intelligence' via dispatchers who were now 'friends'. He gave the observable illusion his army was leaving the region, yet could still effect the bogus letter (or merely the information orally) to reach the mercenaries at the pass after its 'interception', who would have taken it right to
Chares. If
Polyaenus' story was falsified, and
Chares and
Proxenus ceased to guard such a nodal strategic position, the reason they did so is indeed a mystery.
This was, IMHO, a masterful display of double-bluff by
Philip (assuming
Frontinus' excerpt was genuine, too):
Philip counted on
Chares, probably not a rank incompetent and the very same commander duped in
Frontinus' exemplar (the Thracians continuing to revolt while the Macedonians were busy elsewhere again a year later is not untenable for
Chares to believe), thinking he surely wouldn't attempt the same ruse twice, thus it must be veritable this time.
Philip, a wily master of war, gambled and it worked. Such an attribute is what made the likes of
Hannibal and
Belisarius such great commanders.
For
Philip's force - needing to be large enough to win yet small enough to engage this enemy quickly enough with the advantage of surprise - to get through the ungaurded pass and defeat a force of some 10,000 men, albeit catching them unawares and now away from its entrance/exit, still required a degree of stealth and celerity which required a 'raid' (defining it as a sudden attack on an enemy). Indeed, the capture of Amphissa may have been uncontested, if
Dinarchus can be sustained that
Proxenus was a traitor while enlisted there (
cf. Against Demosthenes, 74).
But, as
Guy T. Griffith aptly wrote, this backdrop constitutes the extant Greek historical tradition at its most poverty-stricken. Hence, we can just never know, and I could be completely wrong. But I enjoy the extrapolating, and very much so discussing the various possibilities and analyses.
Thanks, James
