Occupying the workshop
Siege vehicles are manufactured in factories. There are a total of six factories in winter grasp. Two are within the Fortress. They cannot be captured Granado Espada vis, but they can be destroyed. Two factories are in the ring zones right outside the fortress. These can be captured or destroyed. The two other factories, found to the southeast and southwest are like the factories within the fortress and cannot be captured, only destroyed. Cutting off the opposing faction supply of siege vehicles can be a game changing strategy. A factory is captured just like taking a tower in Eye of the Storm, by destroying all members of the opposing faction and occupying the workshop.