[Etaoin Shrdlu]

Originally posted by Norfleet:

It can greatly slow the advance of an enemy army, giving you time to regroup. However, if you have nothing to regroup WITH, then what's the point?

And that's highly unlikely, since the regrouping will be all those troops built at all those other castles that aren't under siege... You end up with the nation-equivalent of a porcupine... except there is no soft part
The maneuver seems to work at top efficiency when the national troops are extra-cheap on resources (Marignon anyone?) or junk (Mictlan comes to mind) or a bit of both (um...Pangaea) . At Wizard-Tower level you start getting near-useless provinces (surrounded by 3+ of them) so it starts getting dicey (and yet: careful placement in high-value spots will work wonders for Caelum and Arcos... I may test one of those in my next test-match with T'ien Ch'i, tho it lacks the appeal with the top-class mages capital-only)