Station

A Firebase is an encampment set up by UNSC Marines in combat zones or other locations that are otherwise hostile. Firebases are normally lettered according the Phonetic Alphabet (Alpha, Bravo, Charlie, Delta...). In a situation where there are multiple firebases, the one with the command structure is called the "HQ" (Head Quarter).

The Firebase appears as a buildable structure in Halo Wars.

Overview
The UNSC Firebase combines the needs of a tactical communication command center and expansion into both a barrack and a production facility capable of assembling combat vehicles. The Firebase itself is a variant of the old colony starter units constructed out of polycrete and powered by a small hydrogen reactor. Because gaining a foothold, quickly was key to fighting insurrection throughout the colonies, ships can directly deploy the entire assembly unit of a Firebase making it immediately useful. That ability proved invaluable in the ongoing war with the Covenant and was often considered a key advantage of the UNSC on the ground.

In addition, Firebases are capable of producing unarmed Warthogs, their lack of armament giving them extra speed.

UNSC Firebases usually contain facilities for soldiers to sleep, eat, be treated for injuries, and where the chain of command is located. These bases usually consist of pre-fabricated structures, such as Cubicles, that are deployed on the battlefield along with ground forces. Firebases act as strong points and bases of operations for Marines during a ground engagement.

The exact process of establishing a UNSC process on a planet is directly tied to an orbital presence. The Spirit of Fire launches the Firebase from orbit, and once it hits the ground it sets up "sockets" for other base structures, which are also launched from orbit, such as a vehicle depot, barracks, and air pad, all connected to the Firebase.

They appear to have room for expansion, such as extra buildings, research facilities, production facilities, training facilities and defensive buildings.

The Covenant possess a doppleganger to the Firebase, being the Covenant Firebase.

Firebases

 * The Battle of Sigma Octanus IV
 * Firebase Bravo