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
2189
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.