The Expanse Wiki
The Expanse Wiki

The Martian Marine Corps (MMC) is part of the Martian Congressional Republic Armed Forces and the space naval infantry branch of the Martian Congressional Republic Navy. The MMC serve on Martian-controlled outposts and on MCRN ships throughout the Sol system, and are the counterpart to the United Nations Marine Corps (UNMC).

Similar to UN Marines, they use powered, vacuum-rated armor and operate in a wide range of combat situations utilizing a variety of equipment and tactics. MMC Force Recon Marines use Goliath Powered Armor whereas standard marines are equipped with Martian light armor.


Tensions Rise[]

Marines onboard the MCRN Donnager guarded the P&K Knight shuttle crew in the brig and later a compartment. When the ship was boarded the Marines fought off the attackers, but failed to prevent the enemy reaching the CIC doors. One squad of marines commanded by Lieutenant Lopez led the Knight survivors to the docked light frigate MCRN Tachi. Upon reaching the hangar bay hostiles had set up positions around the bay and the Marines provided covering fire for the civilians to reach the frigate. However, heavy enemy fire killed all the marines and fatally wounded Lieutenant Lopez who succumbed to his wounds after the Tachi escaped. When the Donnager was scuttled all remaining marines onboard were killed.

After being assigned aboard the MCRN Scirocco, Gunnery Sergeant Roberta Draper's unit was to land and secure Phoebe Station. However, Draper's unit never did secure it as the Scirocco fired torpedoes and destroyed the station to prevent UN Marines from the UNN Nathan Hale from landing on it.

On the surface of the moon Ganymede a squad of Marines spotted a UNMC squad seemingly rushing towards them. Bobbie radioed in that they were being rushed before communications were jammed by a third party. Above in orbit the MCRN Jupiter fleet and UNN Jupiter fleet both believing their ground forces were under attack engaged each other. Seeing the battle in orbit Draper ordered her squad to form a line and engage if they enemy got close. As the seven UNMC marines got close Bobbie realised that the 7th was not a marine but something else. An engagement commenced and of the four MMC marines three were killed with Draper severly wounded. As she lay, she saw a creature over her before a drone activated its auto destruct.

After the battle, Draper was rescued and was made to attend a peace summit on Earth following the Ganymede incident.

After James Holden was framed for a terrorist attack and fled into the Slow Zone the MCRN Xuesen followed and launched a dropship containing a Force Recon Marine squad towards him who was in Martian light armor moving towards the Ring Station. The dropship landed on the station's surface and the marines chased Holden inside. Upon getting inside, the marines fired upon Holden and MMC Lieutenant Paolo Mayer threw a grenade that damaged part of the structure. In retaliation, the ancient station lifted Mayer up and tore him apart before melting his remains into the structure. The remaining two Marines grabbed Holden and returned with him to the dropship.

Later, after transferring to the OPAN dreadnought Behemoth, they were forced to remove their Goliath Powered Armor. When a unauthorised broadcast was made the marines were ordered to get their armor and stop it, but upon reaching the armory they discovered that their suits had been stolen. Proceeding with standard weapons they encountered the people making the broadcast who turned out to be the crew of the Rocinante. Bobbie met in a hallway with Alex Kamal and tried to reason with him, but the other two marines unexpectedly attacked both her and Alex. After a fist fight Bobbie knocked out Private Riko Oshi whilst Private Jed Trepp was shot dead by Amos Burton when he attempted to shoot Alex. Bobbie received a wound to her stomach however.

Free Navy Conflict[]

During the Ceres Offensive of the Free Navy Conflict, a MCRN heavy frigate of the EMC Joint Fleet docking with Ceres' docks dispatched two MMC Force Recon marines to secure the imminent area of the docks, before UNMC and regular MMC marine troops advanced to support the landing and occupy.

After the initial arrival, several hidden explosives of the Free Navy severely damaged Ceres' docks and likely killed and injured a number of UNMC and MMC marines.

Power armor equiped marines took the Knight survivors to a compartment and kept them in it for the journey to Mars. However six seemingly belter ships managed to board the Donnager the marines gave the civilians their vac-suits and escorted them to the hangar bay where the Tachi was docked. The civilans got onboard and escaped but only one marine Gomez made it onboard and the high-g burn to escape caused his badly wounded body to be smashed against his armor killing him.

Note: This is a generic section stub. Expand it by clicking FandomDesktop pencil small-white-26x26.png to right of the section title.

Branches of the MMC[]

Unit branch Appears Notes
Martian Marine Infantry TV and Books Equipped with Martian light armor
Martian Marine Armor Books Operates Combat Mechs such as Yojimbo
Martian Marine Force Recon TV and Books Special Forces branch equipped with Goliath Powered Armor

Members of the Martian Marine Corps[]


Prop Notes[]

511 Tactical Apex Gunners Belt