The Fortress is a semi-permanent UNSC modular base that acts as a command center.
It is deployed on to viable foundations by the UNSC Spirit of Fire via Pods. The Firebase consists of a command center, capable of training scouts and unique leader units, and seven building sites, of which several types of facilities can be built upon.
A series of buildings can be constructed on the Firebases three building sites, so long as the individual has the required resources and tech level:
The Fortress offers the highest number building sites of the three bases. Despite the Fortress requiring the most resources and time to construct, the Fortress is most commonly used for main bases, due to its high building capacity, and high health.
Players may also destroy the Fortress to prevent the opposition from gaining valuable points from its destruction, to free up an empty base site for another member on the same team, or to impose damage on units close to it.