|The Assembly of Iron|
|Other major cities|
|Theater of operations|
The fire giants seem to be responsible for their construction. is capable of creating giants of iron known as Stormforged Iron Giants, can be seen assembling iron vrykul, and toils over the Colossal Forge, creating the iron armies that will conquer Azeroth in Yogg-Saron's name. The Forge of Wills can also (at least) make iron dwarves.
Despite the defeat of both and , there are still many iron troops throughout Northrend. and are looking for a way to "fix" them.