Participants in the Fall of Reach

The participants in the Fall of Reach were numerous. Both the Covenant and the UNSC deployed large numbers of naval and groundside forces.

Naval assets
The UNSC's naval assets were quite extensive during the battle. Orbital defense platforms were used to counter the Covenant. An Unidentified UNSC ship was also somehow used, but destroyed over Reach.

Ground forces

 * UNSC Army
 * 124th Mechanized Infantry Brigade
 * 1st Regiment
 * 6th Regiment
 * 13th Regiment
 * 47th Regiment
 * 127th Regiment
 * 501st Regiment
 * 34th Infantry Brigade
 * 4th Regiment
 * 14th Regiment
 * 581st Regiment
 * 594th Regiment
 * 554th Battalion
 * 1337th Battalion
 * Third Mechanized
 * Special Warfare Command
 * 3 Charlie
 * Noble Team
 * 7 Delta 19
 * Charlie 27
 * 4 Charlie 27
 * 1 Alpha
 * 1 Alpha 3
 * Foxtrot 21
 * 7 Charlie 40
 * Oscar 18
 * Evacuation Team 7
 * Recon 43
 * Iron Fist
 * 3 Echo
 * UNSC Marine Corps
 * ODST Special Purpose Forces
 * Bullfrogs
 * 105th Shock Troops Division
 * 2nd Shock Troops Battalion
 * 7th Shock Troops Battalion
 * 11th Shock Troops Battalion
 * Alpha-Nine
 * 22nd Shock Troops Battalion
 * Charlie Company
 * Gamma 1
 * Gamma 5
 * 12th Marine Regiment
 * 1st Battalion 12th Marines
 * 3rd Battalion 12th Marines
 * 4th Battalion 12th Marines
 * 5th Battalion 12th Marines
 * UNSC Navy
 * SPARTAN-II Blue Team
 * SPARTAN-II Red Team
 * Team Alpha
 * Team Beta
 * Team Gamma
 * Team Delta
 * UNSC Air Force
 * AMX-4
 * AMX-42
 * Unknown
 * Echo Team
 * Gauntlet Team
 * Romeo Company

Fleets

 * Epsilon Eridani Fleet

Vehicles
Over the course of the battle, the UNSC utilized a variety of its vehicle arsenal. Numerous M12 Warthog variants were deployed to engage the Covenant. These include the M12 Chaingun Warthog, M12G1 Gauss Warthog, the M12R Rocket Warthog, and the M831 Troop Warthog. The M808C Scorpion and the M274R Mongoose were also deployed.

The UNSC also deployed a number of aircraft including the UH-144A Falcon and UH-144B Falcon, and the D77-TC Pelican. The YSS-1000 Sabre and the SS-110 Longsword were also deployed by the UNSC.

Naval assets
The Covenant deployed numerous naval forces. Two fleets were sent to the planet, pre-August 30th with numerous ships. By August 30th, 2552, the Covenant sent 315 ships to attack Reach.

Ground forces

 * Ministry of Fervent Intercession
 * Devoted Sentries

Fleets

 * Ministry of Fervent Intercession
 * Fleet of Valiant Prudence
 * Unknown
 * Fleet of Righteous Vigilance
 * Fleet of Holy Respite
 * Fleet of Particular Justice

Vehicles
The Covenant deployed a number vehicles in their campaign against Reach. They deployed the Type-26B Banshee, the Type-25 Spirit, the Type-52 Phantom, Phantom gunboat, the Type-27 Banshee, and the Morsam-pattern Seraph.

Ground side, the Covenant deployed a number of vehicles including the Type-32 Ghost, the Type-26 Wraith, the Type-48 Revenant, and the Type-47B Scarab.

Production notes
In early renders and footage for Halo: Reach, the Falcon was noted as being part of VMX-22.

A number of named soldiers are also seen as having participated in the battle through the randomizing Fireteam mechanic in Halo: Reach.