Great War Era

The **Great War Era**, or **Human-Covenant War Era**, is the period following the botched first contact between humanity and the Covenant. The hegemony proves to be an overwhelming foe, and humanity is brought to the brink of extinction, saved only by sheer luck.

## Timeline

### 2520s

**2525**

February 3 - The planet Harvest makes contact with Covenant cruiser *Rapid Conversion.* Contact is lost with planet soon after.

February 11 - The first formal contact between humanity and the Covenant ends badly. Official beginning of the Human-Covenant War.

February 28th - Birth of Commander Miranda Keyes

March 9 - The Spartan-IIs begin undergoing their augmentation procedures.

June 30 - NAVSPECWEP approves the production of the MJOLNIR Mark IV armor.

September 14 - Operation: TALON. Spartan IIs undergo their first mission, successfully capturing URF Colonel Robert Watts.

October 7 -

November 27 - Battle of Chi Ceti. First engagement with Spartans in MJOLNIR

December 3 - Battle of Alpha Corvi

**2526**

March 1 - Second Battle of Harvest

March 8 - Beginning of Operation: SILENT STORM

April 25 - End of Operation: SILENT STORM

June - Battle of Netherop

October 21 - Battle of Alpha Aurigae

**2528**

December - Fall of Madrigal

### 2530s

**2530**

January 30 -Birth of Kat-B320

**2531**

February 9 - Battle of Arcadia

February 23 - Battle of the Etran Harborage begins

February 25 - The *Spirit of Fire*'s crew destroys the Etran Harborage

May 1 - OPERATION: SMOKING ACES. Blue Team assassinates URF General Howard Graves

October 24 - Proposal of the SPARTAN-III program

December 27 - Spartan-III Alpha Company begins training

**2532**

Battle of Jericho VII begins

**2533**

January 28 - Birth of Lucy-B091

Birth of Tom-B292

**2535**

February 12 - The Covenant glasses Jericho VII

Formation of the Fleet of Particular Justice

**2536**

June 1 - The Covenant begins to enter the Inner Colonies.

**2537**

July 27 - Operation: PROMETHEUS

Spartan-III Beta Company begins training.

**2539**

Battle of Kholo

### 2540s

**2542**

Development of the MJOLNIR Mark V begins

**2543**

April 18 - Battle of Psi Serpentis

**2544**

Operation: WARM BLANKET

July - Approval of Spartan-III Gamma Company

Construction of UNSC *Infinity* begins

**2545**

July 3 - Operation: TORPEDO

Spartan-III Gamma Company begins training

Initiation of Project Freelancer

**2547**

May 21 - Existence of Spartan-IIs becomes public knowledge

Development of the Saber Project

**2549**

September 9 - Fall of Arcadia

November 7 - Activation of Cortana

Formation of the Banished

### 2550s

**2550**

Glassing of Minab

 (RvB S10)

**2551**

February 19 - Spartan-III Gamma Company begins their week-long augmentation procedures, as part of Project CHRYSANTHEMUM.

Battle of Meridian

**2552**

July 17 -Battle of Sigma Octanus IV begins

July 18 - The UNSC win in the Sigma Octanus system, but a Covenant tracker is placed on the UNSC *Iriquois*, leading them to Reach.

July 23 - The Covenant's Fleet of Valiant Prudence knocks out Reach's out-system communications.

August - Battle of Tribute begins.

August 27 - Plans for Operation: RED FLAG are briefed to the Spartan-IIs recalled to Reach.

August 30 - Fall of Reach

September 13 - Operation: FIRST STRIKE

September 19 - The *Pillar of Autumn* reaches Installation 04, a Halo Ring, and crash lands on it. The crew begin a guerrilla campaign against the Covenant on the Ring.

September 22 - John-117 destroys the Halo, ending the Battle of Installation 04.

October 20 - Beginning of the Battle of Earth

October 31 - Beginning of the Onyx Conflict

November 3 - The Great Schism begins.  UNSC ceasefire with Fleet of Retribution

November 17 - The Portal at Voi is activated

December 11 - Collapse of the Covenant. Unofficial end of the Human-Covenant War.

(RvB S1)