Technological inferiority is only a
weakness, and at this stage in history not even necessarily as crucial one as, say, muskets versus machine guns. If the plains nation is large and populous enough, they might try to trade space for time much like happened on the Eastern Front in World War II.
Actually, I can see much of the tension in the story deriving from the interplay between one side striving for a decisive strike and the other hoping to last long enough to win a war of attrition. For the plains nation, the bad harvest might only lead to a little belt-tightening until the next harvest, while the mountain nation needs that food now
to survive. It would ultimately become a struggle over whether or not the mountain nation can seize enough granaries not to starve that winter.
Not that I'm saying it has to be written that way, but it's an interesting angle.
edited 10th Oct '11 8:04:06 PM by Specialist290