[Arryn]

Province defense (PD) is a static garrison that is very useful to defend against unexpected magical attacks from afar by summoned creatures, probing attacks by AIs, or an easy conquest by stealthed units. Depending on your situation, it is also useful to have mobile "fire brigades" to hunt down anything that might get past your front lines. If you are magically strong (in astral), you can use labs as "airbases" to quickly shuttle armies around the map to where they may be needed.

EDIT: if you've been reading my AAR, you'll have seen that I'm under continual attack by Vanheim, magically, in random provinces of mine. If I did not have PD in all my provinces I'd be in trouble. Of course, Jotunheim has arguably the best PD troops in the game (giants), so buying PD as Jotunheim is a really good investment. YMMV with other nations. R'lyeh has lousy PD (except for the illithid commanders). Some other nations have even worse PD troops (hard as that may be to believe).

[ March 16, 2004, 06:33: Message edited by: Arryn ]