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The subject of this article appears in Call of Duty: Infinite Warfare The subject of this article appeared in Call of Duty: Siege.

The United Nations Space Alliance (UNSA) is an international political organization that handles matters related to trade, travel, land claims and all efforts relating to human space colonization. Their military force is represented by the Solar Associated Treaty Organization (SATO). It is currently opposed by the Mars-based Settlement Defense Front.

The UNSA was created as a means to control and monitor off-world colonies in order to obtain resources to maintain Earth geo-engineered atmosphere, which was necessary to resources shortages and climate change on Earth.

The UNSA was founded after the Secession Wars 30 years before the events of Call of Duty: Infinite Warfare, when Earth lost control of Mars, its moons, and several other moons in the process. The UNSA owns a military force equal in strength to those operated by the SDF, though unlike the SDF, the UNSA military is 100% volunteer while in the SDF, all capable men are conscripted from age 12. This leads to SDF having 900% more soldiers per capita than the UNSA. However, since the UNSA is significantly more populated than the SDF, the overall total numbers between these two forces should be somewhat equal.

The UNSA navy consists of 21 faster-than light (FTL) capable ships, far smaller than the SDF's approximately 60 FTL capable vessels. This may have reflected a "quality over quantity approach" - for example, the UNSA Atlantic, a destroyer, had at least 22 confirmed kills against SDF Warships, while carrier UNSA Retribution would later destroy a large number of enemy ships and structures during the UNSA's war with the SDF. However, the UNSA's smaller fleet size was also down to internal disputes - the UNSA had been reluctant to challenge the SDF's growing military power, with politics leading to the threat being ignored for years due to an inability to get any agreement on a response, allowing the SDF to become increasingly brazen until it was too late.[1][2]

To defend its territory, the UNSA built AATIS guns, massive cannons that could easily cripple spacecraft. Such was the power of these weapons that it was impossible for any ship to attack an area defended by them; the SDF would instead sabotage them using their operative Akeel Min Riah as a means of allowing their forces to attack Geneva.[3]

UNSA territories include, but are not limited to:


The UNSA appear in Call of Duty: Infinite Warfare multiplayer as a playable faction. The multiplayer announcers are Nora Salter, Usef Omar, and an unknown robot. They always fight the Settlement Defense Front. They appear in all maps.