United Nations Space Command

The United Nations Space Command (UNSC) may be the prime human government in the Halo universe, though this organization may only be the defense agency under the control of the Colonial Administration Authority. The UNSC's military arm is called the United Nations Space Command Defense Force, they are most commonly seen defending planets. Stations such as the Cairo Station are part of the UNSCDF. During the events of Halo 2 the UNSC fought the Covenant above Earth by defending their planet against all odds.

There are several breakaway factions opposed to the Colonial Administration and UNSC as well, including the United Rebel Front.

Background
The UNSC was formed by the United Nations when over-population on Earth started becoming a problem in the early 22nd century. The UNSC is run by HIGHCOM (which may be akin to the Pentagon of the USA's defense apparatus) and is Earth's premiere defense against the Covenant. The Navy houses the divisions of Marines (including the Orbital Drop Shock Troopers), and Office of Naval Intelligence, and the fleet. Originally designed to keep the peace between neighboring planets and star systems, when certain rebellious factions began to rise in the late 2510s the UNSC was forced to police its colonies to keep privateers and pirates from raiding them. After Harvest, a colony planet, was destroyed, one badly damaged UNSC ship returned to tell the tale of monstrous alien ships that utterly destroyed the colony. The UNSC doubled its shipbuilding to bolster themselves against the Covenant, but it was useless, for the Covenant's technology was far superior to mankind's. The UNSC fortified major positions such as Reach, the UNSC's main shipyards and command center, and Earth. So far, the UNSC is losing the Covenant war, and the only end in sight seems to be utter annihilation. Recently, the Covenant Civil War has seen the Arbiter and his people, the Elites, join forces with the UNSC against the remainder of the Covenant in a desperate fight for survival.

A Short History
The United Nations Space Command was formed as the result of a series of brutal wars across the Solar System between 2160 and 2164, most prominently among them the Jovian Moons Campaign, The Rain Forest Wars, and a series of battles on Mars. These conflicts were centered around UN clashes with dissident political movements, the most important of which were the "Koslovics" and the "Frieden." More specifically, the Frieden movement was a fascist organization based on the Jovian Moons, though they received backing from some corporations operating in the United German Republic on Earth, while their ideological opponents, the Koslovics, formed a Marxist-Leninist group centered around the leadership of Vladimir Koslov.

The war began with an attack on UN military advisers on the moon of Io, but would spread to Mars and parts of South America in the Rain Forest Wars. These events culminated in a large UN buildup in the 2160s, which would change the UN from a largely diplomatic organization to a permanent military power; the war's consequences also helped make way for a unified government seated on Earth to lead the human race by 2170. The four-year long war put the spotlight on problems facing the overpopulated planet, and the Rain Forest Wars also exacerbated the problems related to food distribution. The ensuing famine and societal problems related to the post-war population boom provided the impetus to change the political nature of governance on Earth and elsewhere, leading to the political system seen in the period of the Halo games.

These pressures also helped make space colonization more attractive in later centuries, as the government would sign off on a colony ship program that was revealed in 2310 to ease the burden on the ailing homeworld. This would not have been possible without the invention of the Slipspace drive in the 2300's.

It took 52 years before the first colony ship, the Odyssey, was launched, and what became the so-called Inner Colonies were not fully colonized until the end of the 24th century. The apex of UNSC colonization would come in 2492, when over 800 worlds were under human control and were at various stages of development. By this time, a ring of Outer Colonies was providing the UN with the raw materials that made the macroeconomy work; the political power, however, remained with the aforementioned Inner Colonies. The massive difference in wealth distribution and political power, which became a hallmark of the humans' civilization by this period, led to new threats of secession from the outer ring. Fearing the consequences of the breakup of the interstellar empire and seeing the benefits of avoiding all-out war to defend their hold on the colonies, the UNSC would embark on the predecessors to the SPARTAN-II program in 2491, beginning with the ORION Project.

Covenant War
The Human-Covenant War started on October 7, 2525 when a UNSC battle group entered the Harvest system and discovered that everything on the planet has been completely incinerated and the surface melted down to glass. In orbit around the remains of the colony world was a single alien ship, which proceeded to attack the battle group, destroying all ships except one. Intercepted communications identify the enemy as The Covenant. The message "Your destruction is the will of the Gods... and we are their instrument" is broadcast in English. . This began the Covenant War, which has raged for 27 years. Since the Battle of Harvest, the UNSC, by the time of 2552, only 536 colony worlds are left. In a desperate move to stop the Covenant, they sent a group of Spartans to capture one of their ships to find their homeworld and capture a prophet. But 2 days before the operation, a massive battle fleet of 314 Covenant warships came out of Slipspace near Reach to recover an artifact and destroy the UNSC base there.

Organization

 * United Earth Government
 * Colonial Administration Authority
 * Central Command (CENTCOM)
 * High Command (HIGHCOM)
 * Administrative
 * Personnel Command (PERSCOM)
 * Navigation Command (NAVCOM)
 * UNSC Astrophysics
 * UNSC Medical Corps (MEDCORPS)
 * UNSC Engineering Corps (ENGCORP)
 * UNSC Logistical Corps
 * UNSC Test and Evaluation Corps
 * UNSC Navy
 * Fleet Command (FLEETCOM)
 * Special Operations Command
 * Office of Naval Intelligence (ONI)
 * Naval Special Warfare (NAVSPECWAR)
 * Project SPARTAN-II
 * Project SPARTAN-III
 * Beta-5 Division
 * Signal Corps
 * '''Prowler Corps
 * UNSC Marine Corps
 * UNSC Marine Infantry
 * UNSC Marine Aviation
 * UNSC Marine Logistics
 * UNSC Marine Special Operations
 * Orbital Drop Shock Troopers
 * UNSC Army
 * UNSC Army Infantry
 * UNSC Special Forces
 * SPARTAN Program
 * Orbital Drop Shock Troopers
 * Other
 * UNSC Symphony Orchestra

UNSC Personnel

 * See Characters for a list of UNSC personnel.

UNSC Navy

 * See UNSC Navy

UNSC Marine Corps

 * ''See UNSC Marine Corps

UNSC Army

 * ''See UNSC Army

Colony Systems, Worlds, and Cities
Sol System
 * Earth - Homeworld to Humanity, currently under attack/conquered in Africa by Covenant.
 * East African Protectorate
 * Republic of Kenya
 * Mombasa
 * New Mombasa
 * Old Mombasa
 * Voi
 * United Republic of Tanzania
 * Zanzibar Island
 * Korea
 * Kyonggi Province
 * Songnam
 * Special Warfare Center
 * Commonwealth of Australia
 * Sydney, Australia
 * HighCom Facility Bravo-6
 * Diego Garcia
 * United States of America
 * Cleveland, Ohio
 * Boston, Massachusetts
 * Chawla Base
 * Federal Republic of Germany
 * Essen
 * Beweglichrüstungsysteme research facility
 * UNSC Symphony Hall
 * Luna
 * Luna OCS Academy


 * Mars
 * Chiron
 * Argyre Planitia
 * Reyes-McLees Shipyards
 * New Legaspi


 * Jupiter
 * Jovian Moons
 * Ganymede
 * Aigburth
 * Lister

Epsilon Eridani System


 * Reach - Primary military installation. Glassed by Covenant in 2552.
 * Highland Mountains
 * CASTLE Base
 * Camp Hathcock
 * Camp Independence
 * Fairchild Field
 * HighCom Armory Omega
 * Military Reservation 01478-B
 * Military Wilderness Training Preserve
 * ODG Facility A-331
 * Olympic Tower
 * Reach Station Gamma
 * Reach Naval Academy


 * Beta Gabriel

Sigma Octanus System


 * Sigma Octanus IV - Still held by the UNSC even though it was attacked in 2552 by the Covenant
 * Côte d'Azur

Eridanus Star System
 * Eridanus II - Glassed in 2530
 * Elysium City
 * Luxor Spaceport

Lambda Serpentis System


 * Jericho VII - Glassed in 2535

Harvest System


 * Harvest - Glassed by Covenant in 2525

Chi Ceti System


 * Chi Ceti IV -Unknown
 * Damascus Testing Facility

Hellespont System


 * Troy - Glassed

111 Tauri System


 * Victoria - Unknown

Zeta Doradus System


 * Onyx - obliterated

Other Colonies


 * Biko - Glassed in 2525
 * Durban
 * Emerald Cove - Glassed in 2542
 * Harmony - Glassed
 * New Harmony - Unknown
 * Draco III - Glassed
 * Paris IV - Glassed
 * Charybdis IX - Unknown
 * Minister- still held by UNSC
 * Hydra System- Unknown
 * Gilgamesh- Unknown
 * Coral - Attacked by Covenant in 2552, unknown/glassed
 * New Constantinople - Glassed
 * Tantalus- Unknown
 * Mamore - still held by UNSC
 * Crystal - still held by UNSC
 * Groombridge 34 System - Unknown
 * Atlas Moons - still held by UNSC
 * Far Isle - Unknown
 * Miridem - Unknown
 * Mariposa-Unknown
 * Ballast-Unknown

UNSC bases


 * Fort York
 * Roosevelt Military Base

UNSC Weaponry
These are the weapons that the UNSC employs against the likes of The Covenant.

Note that all the handheld weapons in Halo 2 apart from grenades can be swapped with the appropriate class of soldier's weapons.

The Novels
The weapons exclusive to Halo: The Fall of Reach, Halo: The Flood, Halo: First Strike and Halo: Ghosts of Onyx.

Handheld Weapons
 * Combat Knife
 * MA2B Assault Rifle
 * MA5K Assault Rifle
 * MA3 Assault Rifle
 * HMG-38 Rifle
 * M19-B SAM Missile Launcher
 * Electric Baton
 * Confetti Maker

Missiles
 * Archer Missiles
 * ASGM-10 Missiles
 * ''ANVIL-II ASM
 * Argent V Missiles
 * Scorpion Missiles

Mines
 * Lotus Anti Tank-Mine
 * Antlion Anti-Personnel Mines
 * Moray Space Mines
 * Type 14 Magnetic/Anti-Tank Mine
 * Asteroidea Anti-personnel Mine

Grenades
 * Smoke Grenade
 * Flash-Bang Grenade
 * Concussion Grenade
 * Napalm Grenade
 * Sonic Grenade
 * Frag Grenade

Machine Guns
 * MLA Autocannon
 * M247 GP Machine Gun
 * M202 XP Machine Gun

Nuclear Weapons
 * Fury Tactical Nuclear Warhead
 * Shiva Nuclear-tipped missile
 * FENRIS Nuclear Warhead
 * Nova
 * HORNET Mines
 * HAVOK nuclear mine

Other
 * VX 7 Nerve Gas
 * Magnetic Accelerator Cannon
 * 102mm SC-HE Rocket Turret
 * Fougass
 * Satchel Charge
 * C-7 Foaming Explosive
 * C-12 Shaped-charges
 * Narcozine Gas
 * Thermite-Carbon Cord

Land

 * Scorpion Tank - M808B Main Battle Tank
 * Warthog - M12 LRV with mounted chaingun, rocket launcher or gauss cannon
 * Mongoose - All-Terrain Vehicle
 * Cougar - Infantry Fighting Vehicle
 * Elephant - Siege Vehicle
 * Rhino  - tank from halowars

Air

 * Pelican - D77-TC Dropship
 * Albatross - Larger Dropship
 * Bumblebee - Escape pod
 * Longsword - C709 Space fighter
 * SkyHawk - Sub-orbital jet
 * Shortsword - Short-range atmospheric fighter-bomber
 * Sparrowhawk - VSTOL Close Air Support Gunship
 * Hornet - VSTOL Gunship/Utility Dropship
 * Kestrel - Deleted vehicle seen in the Halo 2 Collector's Edition Disc.

UNSC Technologies

 * See Technology

UNSC Vessels and Stations

 * See UNSC Navy

Known UNSC Military Units

 * UNSC Navy
 * UNSC Marine Corps
 * Orbital Drop Shock Troopers
 * UNSC Army
 * Office of Naval Intelligence
 * UNSC Special Forces

Major UNSC Events

 * Interplanetary War - 2160-2200
 * Inner Colony Wars - Unknown, probably 25th century
 * Human-Covenant War - 2525-Present
 * The Battle of Harvest
 * The Battle of Sigma Octanus IV
 * The Battle of Reach
 * The Battle of Installation 04
 * The Second Battle of Earth
 * The Battle of Onyx

UNSC Laws

 * See UNSC Laws