Expansion Era

In the **Expansion Era**, following the end of the Reaper War, with Element Zero shortages, humanity is forced to return to more traditional technology. Colonization continues, but only in the area of space surrounding Earth.

## Timeline

### 22nd Century

#### 2180s

**2187**

October 6 - Birth of Jack Cooper

Prevalence of mass effect field-based technology begins to rapidly diminish as Element Zero shortages are rampant in the aftermath of the Reaper War. The last stocks would be depleted during the conflicts in the Frontier.

Humanity begins attempting to find other forms of FTL

Stranded human colonies are either found by other Citadel races or are forced to fend for themselves. In the Attican Traverse, they eventually encounter the Chozo.

**2188**

After two years of stockpiling and preparing, the armies trapped in the Sol system depart for their homeworlds, using human-donated cryogenic technology, as with the Mass Relay system down, they have no practical way of returning home. Unbeknownst to them, although the Charon Relay

2**189**

In desperate need of resources, the UNSC tasks the Interstellar Maufacturing Corporation with obtaining materials from the Frontier.

#### 2190s

**2192**

Beginning of the Titan Wars

### 23rd Century

#### 2200s

**2204**

Proper establishment of the UEG as a fully autonomous entity, maintaining Earth's power among the colonies.

ONI begins an extremely slow disinformation campaign to remove knowledge of mass effect technology and the wider galactic community, believing that humanity needed to advance on its own terms, without outside influence, as well as believing that having technology entirely alien to the rest of the galaxy could prove beneficial. ONI eventually obtains and conceals all mass effect-based technology within human space in hidden installations.

**2209**

 (AvP 2010)

#### 2210s

**2210**

The Frontier War

Battle of Demeter

effectively cutting off the Frontier from the Core Worlds

**2215**

Operation Broadsword

April 20 - Birth of Wallace Fujikawa

October 28 - Battle of Typhon. The Militia scores a massive victory,

**2218**

Introduction of the M808 Scorpion

**2219**

(Fire and Stone)

#### 2220s

**2220**

January 20 - Birth of Tobias Fleming Shaw

Final stores of element zero outside of ONI installations are depleted

#### 2290s

**2291**

April - Invention of the Shaw-Fujikawa Translight Engine/Slipspace Drive.

### 24th Century

#### 2300s

**2302**

Mombasa is selected to be the first city on Earth to host a space elevator.

#### 2310s

**2310**

Colony ships depart the Sol system to form the Inner Colonies.

Formation of the Colonial Administration Authority and Colonial Military Authority.

The Assembly is active by this point.

**2319**

The first prototype of the M12 Warthog is unveiled, dubbed the "Z-12".

#### 2320s

**2320**

September 16 - Maximals and Predacons enter transwarp, ending up in 180,000 BC Earth

**2321**

April 13 - Initiation of the ORION Project

**2329**

The Warthog becomes ubiquitous within the UNSC.

#### 2330s

**2332**

August 22 - Birth of Hod Rumnt/High Prophet of Mercy

#### 2350s

**2358**

Voyage to Darwin IV

#### 2360s

**2362**

January 1 - Launch of the *Odyssey*, the first terraforming colony vessel, sparking a new wave of colonization. It lands at Reach.

#### 2390s

**2390**

210 planets, in various stages of terraforming, become the Inner Colonies. The overpopulation in the Sol system ceases.

**2392**

The D77-TC Pelican is adopted by the UNSC.

**2396**

March 15 - Birth of Ord Casto/High Prophet of Truth

### 25th Century

#### 2400s

**2403**

Early models of HRUNTING/YGGDRASIL Mark IX Mantis are used by the UNSC

#### 2410s

**2412**

Colonization of Alluvion, the first of the Outer Colonies to be settled by humanity

#### 2420s

**2428**

Formation of Galactic Federation (in the year 2003 in their calendar). The Chozo invite other races near or within their territory to join into an intergalactic government, similar in function to the Citadel Council.

**2429**

Colonization of Arcadia

#### 2430s

**2431**

Colonization of Meridian.

#### 2440s

**2442**

December 29 - Birth of Michael Jon Carter/Booster Gold

#### 2450s

**2451**

Birth of Eobard Thawne/ Reverse Flash

#### 2460s

**2461**

October 28 - Birth of Lod Mron/High Prophet of Regret

Birth of Admiral Margaret Parangosky

**2462**

Unsatisfied with their lowly position within the Covenant, the Unggoy Rebellion is launched. The Sangheili glass parts of Balaho in order to pacify the insurgent crustaceans. The Unggoy were awarded a modicum of respect by the Sangheili.

**2468**

Colonization of Harvest

#### 2470s

**2470**

November 3 - Birth of Vice Admiral Preston Cole

**2478**

June 2 - Birth of Arbiter Ripa ‘Moramee

#### 2480s

**2480**

August 6 - Birth of Samus Aran

**2483**

Raid on K-2L

**2485**

December 10 - Birth of Arbiter Thel ‘Vadam

**2487**

September 21 - Birth of Shipmaster Rtas ‘Vadum

**2489**

March 5 - Birth of Supreme Commander Jul ‘Mdama

#### 2490s

**2491**

July 8 - Birth of Chieftain of the Jiralhanae Tartarus

Discovery of Onyx

Publication of the Carver Findings

Treaty of Elysia

**2492**

March 19 - Birth of Dr. Catherine Halsey

Upon finding Doisac, the Jiralhanae are quickly subjugated and assimilated into the Covenant

**2494**

January - Callisto Incident

March 2 - Effective beginning of the Insurrection against the UEG

(Zebes Iono Feria breakout)

**2495**

February 8 - Birth of Captain Jacob Keyes

**2496**

January - Operation: CHARLEMAGNE

Chozo development of the Metroid is completed

Space Pirate invasion of Zebes

**2497**

The UH-144 Falcon and SP42 Cobra enter service in the UNSC Army and Marine Corps, respectively..

**2498**

The AC-220 Vulture gunship is utilized for the first time by the UNSC

**2499**

October 19 - Birth of Gek 'Lhar

### 26th Century

#### 2500s

**2500**

Attempted assassination of Chairman Keaton

Zero Mission

Operation: KALEIDOSCOPE

**2501**

 (metroid Prime)

**2502**

 (metroid prime 2)

**2503**

 (metroid prime 3)

**2504**

 (Metroid II)

(Super Metroid)

**2505**

 (Other M)

**2506**

 (Metroid Fusion)

**2507**

Construction of the UNSC *Pillar of Autumn* begins.

**2509**

Formation of the United Rebel Front

#### 2510s

**2510**

May 28 - Birth of Warmaster Atriox

August 15 - Birth of Captain Thomas Lasky

August 22 - Birth of Edward Buck

September 21 - Birth of Kelly-087

**2511**

March 5 - Birth of Jorge-052

March 7 - Birth of John-117

March 19 - Birth of Linda-058

April 3 - Birth of Fred-104

July 10 - Birth of Samuel-034

October 19 - Birth of Kurt-051

UNSC finds first Forerunner relics on Onyx

Initiation of the SPARTAN-II Program, then known as "ORION Project Generation II"

**2513**

Initiation of Operation: TREBUCHET

**2517**

September 24 - Initiation of the SPARTAN-II training

#### 2520s

**2520**

August 27 - Birth of Carter-A259

**2523**

March 11 - Birth of Emile-A239

**2524**

February 28 - Birth of Jun-A266

September 2 - The *Horn of Plenty*, an unmanned human freighter, is found by the Covenant missionary ship *Minor Transgression*.