Bring the completed War Golem Blueprints to Prospector Rokar at Camp Oneqwah.
Prospector Rokar has decided to help us. He's concocted a plan to use the iron dwarves' strength against them.
I must admit, our new 'friend' is more insightful than I'd given him credit for. He's correct in that our numbers are too few for a direct attack.
Travel to Dun Argol, in the snowy regions to the southeast, and capture all the parts of their war golem blueprints from the iron rune-smiths there. Bring the assembled blueprint to Rokar and we'll see if his plan has any merit.