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The SPARTAN Branch, also known as the Spartan Corps,[4] is a branch of the UNSC, founded by Musa-096.[1] It encompasses only the members of the SPARTAN-IV program and the surviving SPARTAN-IIIs who converted into to SPARTAN-IVs.[5] Members of the SPARTAN-II and SPARTAN-III programs belong to the Navy branch instead.


This section requires expansion.


“It clearly suggests that the Spartan branch has rapidly and unapologetically become its own thing... almost overnight.”

During the creation of the Branch, all remaining SPARTAN-IIIs were offered to be incorporated into the Spartan branch.[5]

The performance of the SPARTAN-IVs during the raid of the UNSC Infinity helped give the Branch near full autonomy from the Navy.[7]


Main articles: First Battle of Requiem and Second Battle of Requiem

When the UNSC Infinity crashed landed on Requiem, the SPARTANs were deployed to fight off attacking Prometheans.[8] Other Spartans were then deployed with John-117 to take down the planet's gravity well and particle canon network.[9] Once it was destroyed, the Infinity escaped Requiem.[10]

Infinity would return to Requiem several months later beginning a new series of Spartan operations.[11]

Other OperationsEdit

Spartan recon teams were also deployed onto the surface of Basis to assess the debris of Installation 04.[12]


Similar to other military branches, the Spartan Branch has a multitude of roles. These roles include reconnaissance,[12] security and patrol,[13] counter insurgency,[14] military police duties,[15] high value asset retrieval,[16] and frontline combat.[17]



Spartan forces are organized into detachments. Within these detachments, they are organized into Fireteams.[2]


“It's one thing to be an over-achieving badass such as yourself, but it is something else altogether to be a Specialist.”
— Sarah Palmer to all Infinity Spartans.[18]

Once a Spartan rates 50 in War Games simulations, they can apply to become a specialist. Specialists receive different sets of weapons and different sets of power armor.[18]



Power ArmorEdit

Spartans utilize the Mjolnir Powered Assault Armor Generation 2 platform of power armors. As per Regulation 3A-950, newly recruited personnel of the Spartan branch have access to one Mjolnir Armor.[19]

Air VehiclesEdit

A new dropship under the name Project SLEIPNIR was developed specifically for use with Spartans.[20]



Main article: SPARTAN-IV Personnel


Main article: SPARTAN-IV Fireteams


The ranking system of the Spartan branch only applies to Spartan-IVs, while Spartan-IIs and Spartan-IIIs still retain their ranks. All Spartan-IVs share the same rank of Spartan and do not possess any formal ranks.[21] The only exception being Sarah Palmer, who is a Spartan Commander.[2][22]


  1. 1.0 1.1 Halo: Initiation - Issue #1
  2. 2.0 2.1 2.2 Halo 4: The Essential Visual Guide - page 33
  3. Halo Waypoint: Universe - Characters - Jun-A266
  4. Halo 4: Official Game Guide, page 380
  5. 5.0 5.1 Halo: Glasslands, page 434
  6. ELEVENTH HOUR#Transmission 3/5ELEVENTH HOUR Transmission 3]]
  7. Halo: Initiation, Issue 3
  8. Halo 4 - Level: Infinity
  9. Halo 4 - Level: Reclaimer
  10. Halo 4 - Level: Shutdown
  11. Spartan Ops - Episode 1: Departure
  12. 12.0 12.1 Halo 5: Guardians - Description: Vector (Armor)
  13. Halo 5: Guardians - Description: Orbital (Armor)
  14. Halo 5: Guardians - Description: Defender (Armor)
  15. Halo 5: Guardians - Description: Raider (Armor)
  16. Halo 5: Guardians - Level: Osiris
  17. Spartan Ops - Episode 1: Chapter 1 - Land Grab
  18. 18.0 18.1 Halo 4 Limited Edition - Bonus Item: UNSC Infinity Briefing Packet
  19. Halo 4 Limited Edition - Bonus Item: Armor Schematics
  20. Halo 5: Guardians - Description: Foehammer (Armor)
  21. Halo Waypoint - Universe, Spartan
  22. Halo 4: The Essential Visual Guide - page 18