Sarah1281 wrote...
The surface really can't afford to restrict trade with Orzammar. Orzammar is the only source of lyrium in Thedas and the Chantry desperately needs it. The dwarves can do without imports until the lack of lyrium breaks the Chantry's resolve. With the templars going mad and getting useless and the mages not being able to replenish their mana or to power more advnaced spells, they're not going to be able to hold out for very long once they run out of lyrium.
Ultimately, no doubt. In the relevant period? Well, I've no doubt that the Chantry has its stockpiles, and if the mages don't have the lyrium for awhile... well, the don't cast spells for awhile.
And, as such a war would most likely not be a snap affair, at the same time the Chantry starts making preparations, stockpiles as well could be built up.
If this war is about evicting an illegal circle of mages from the Dwarves, the Chantry doesn't have to occupy the Dwarven Underground. They just need to make it more troublesome for the Dwarves to harbor the mages.
A surface blockade doesn't need to starve the dwarves, it just needs to tighten their bellies. Not simply a threat against Dwarven interests need be applied, but also carrots (better trade deals if they evict the mages, assistance against the Darkspawn from Templars, etc.).
It isn't about the dwarves, it's about a small group of mages hiding among the dwarves. The connections and interests between Dwarves and Mages are... unlikely to be strong.