A Wall Hub allows the production of a faction's walls, and are available to all factions except for Goblins and, in The Battle for Middle-earth II, except for Mordor. This structure either is built by the faction's Builder, or can be constructed from a build plot at the faction's . For Isengard and Elves, the only available wall-upgrade is a gate. For the others, arrow towers (Axe towers for Dwarves), catapult expansions, and Postern gates are available.