Thrall: Those Iron Horde cannons are laying waste to our troops. I’m not sure how much more of this we can handle. Our forces are already spread too thin.
There has to be a way to stop those war machines.
Sabotage 3 Iron Demolishers. (Coordinates: 63, 38)
Thrall: We cannot win this battle if those Iron Horde war machines remain operational.
Thrall: It will take the Iron Horde quite a while to get those demolishers operational again. Throm-Ka, (name).
Under Siege – Tips
You may find the Iron Demolishers around the Shattered Front in Blasted Lands, by the eastern beach south of Nethergarde.
Visit the Warlords of Draenor Quest Guides
Video found here.
Iron Horde Invasion Storyline