Fortified structure upgrade

The Fortified Structure is an upgrade exclusive to the Global Liberation Army, first made available to GLA generals rather late in War Against the GLA.

Overview
This upgrade can be purchased at any palace the general in question owns, and only needs to purchased once, as with all upgrades in Command and Conquer: Generals.

The upgrade boosts the armor of all the buildings that are affected (see below) that the general purchasing the upgrade owns. The affected buildings' appearances also change; after the upgrade, they will sport barbed wire and sandbag barriers.

Affected buildings

 * Command center
 * Supply stash
 * Barracks
 * Arms dealer
 * Palace
 * Black market

Unaffected buildings

 * Tunnel network
 * Stinger site
 * Scud storm

Changelog

 * Zero Hour patch 1.03: fixed the problem that would cause GLA workers to stop gathering resources when buying the fortified building upgrade