Praimfaya 1.0 - history, timeline, the Ark and more
So Iâve been watching season 3 and decided to gather all the information about the first Praimfaya, Becca Pramheda, Eligius ship and Unity Day and put it into chronological order.
1959 - The Mount  Weather Emergency Operations Center is founded (it is based on actual facility, JRoth confirmed it). It is constructed to house senior US officials in the event of a nuclear war.Â
It is safe to assume, Mount Weather was inhabited by descendants of the US government and military officials that survived the nuclear apocalypse in the underground bunker.Â
Itâs in Blue Ridge Mountains, Virginia, about 40 miles from Washington, D.C (later TonDC).Â
2001Â - Association football (FIFA) game is played as seen in flashbacks on the Ark. Clarke says it ended 147 yars ago.
2019Â -Â Mir-3, predecessor of the Ark, is presumably launched.
2040s - Earth loses contact with Asteroid Mining Penal Colony.
The Eligius Corporation is a mining company that transported prisoners to the Asteroid Mining Penal Colony. Jackson mentions to Abby that Becca first developed the Nightblood for the Eligius Mining Company to protect against solar radiation for long space missions, in which criminals were put into hypersleep and were given Nightblood to protect them from radiation. In 4x1 thereâs an article on screen titled âContact lost with Asteroid Mining Colonyâ.
The Second Dawn is a Doomsday Cult, that i founded by the cult leader, Bill Cadogan. He believes that the apocalypse is coming and wants humanity to survive. Cadogan builds a bunker that can save approximately 1,200 people. An article titled âSecond Dawn Investigation Underwayâ from the Chicago Weekly Herald can be seen on one of Ravenâs monitors as she explains 2048 nuclear reactor technology to Jasper and Monty. This is the first mention of the Second Dawn doomsday cult.Â
2048Â - Two dozen mega reactors had been built to withstand any disaster, even a nuclear attack.
Becca creates A.L.I.E. on Oct. 20. She is 26.
That same year, she has to lock up A.L.I.E. because her answer for what was wrong with the world was âtoo many peopleâ.Â
Fearing A.L.I.E., she decides to continue her research on her space station Polaris. Sheâs trying to perfect A.L.I.E. 2.0, when A.L.I.E. causes the nuclear apocalypse.Â
The first Praimfaya takes place on May 10, 2052, when Chris accidentally letsA.L.I.E. out. A.L.I.E. successfully launches nuclear missiles from various countries around the world, including 27 missiles from China targeting the U.S.Â
In the bunker in 2x16, Murphy finds a TV and pushes play. A home movie in the same bunker appears onscreen. Murphy watches as the man explains how he lost control and how âsheâ got the launch codes. He apologizes before shooting himself dead.Â
According to Becca, about 6.5 billion people were killed in the aftermath. However, some survivors remained, these included the ancestors to the Grounders, the Mountain Men, and the Sky People.Â
In the Pilot, Jasper wears a T-shirt with âEarth day 2052âł on it.
2054,  1 Oct. - Unity Day
In addition to A.L.I.E., Becca creates the Nightblood serum and a second version of the AI. In the meantime, commander McAdams is preparing to dock with the other twelve stations to create the Ark, but he fears the AI will infect all 12 stations if it remains on board. Becca pleads that the AI will save them on the Ark and can help human scientists giving them calculations to ensure their survival. Becca locks herself in the lab and inserts the AI chip into her neck. Later, Becca escapes Polaris just before it is destroyed and descends to Earth to become the first Commander. That is why, the place where she landed is called Polis (letters âarâ in Polaris were burnt during landing), Groundersâ leaders are called Commandors (it was written on Beccaâs suit) and they have Nightblood (Becca probably injected the survivors she met after landing). In 2150, Murphy analyzes an old escape pod and Grounder cave paintings. From them, he theorizes, that the First Commander came from Polaris.Â
2086Â - Dante Wallace is born.
2093Â - The doors of Mount Weather are opened, 54 people die of radiation, including Danteâs sister and mother.
Presumed beginning of the experimentation on Outsiders.
2102Â - MIR-3 salvaged and incorporated into The Ark.
2107Â - Marcus Kane is born.
2109Â - Abigail Griffin is born.
2126Â - Bellamy Blake is born.
2128Â - Lexa kom Trikru is born.
2130Â - Raven Reyes is born
2131Â - Clarke Griffin is born.
2132Â - Octavia Blake is born.
2148 Fall - Catastrophic Life Support System Failure discovered.
Jake Griffin gets floated as he attempts to go public with the discovery.Â
Clarke  Griffin is sent to juvenile detention for treason.Â
Octavia  Blake is sent to juvenile detention for being a second child.Â
Aurora  Blake gets floated for having a second child.
The 100 receive Earth Skills from Pike on The Ark.
The 100 are sent to Earth and land in what was formerly Virginia in the  United States of America.
- The 12 nations that formed the Ark:
1.      Australia
2.      Brazil â> Mecha Station
3.      Canada
4.      China (Shenhzen) â> Arrow Station, the airlock, where Jake Griffin was floated (arguable)
5.      France
6.      India
7.      Japan â> Skybox
8.      Russia (Mir-3) â> might be a part of Go-Sci
9.      United Kingdom
10.    United States â>  Government & Science Station (Go-Sci /The Ring), including Ark Station Medical, Earth Monitoring Station and Alpha Station
11.    Uganda
12.    Venezuela
Thereâs also a rememberance book on the Ark, that has The Grounders names in it. We can see familiar ones: Miller, Blake, Murphy, Jaha, Jordan. The names indicate nationality of the first residents of the Ark (I can even see a couple of polish ones!).
- Names of the stations (arguable):
1.      Alpha - Abby, Jake, Clarke, Millers, Jaha, Wells
2.      Farm/Agro - Jasper, Monty, Hannah, Bryan, Pike, Riley
3.      Hydra
4.      Mecha - Raven and Finn
5.      Factory - Aurora, Bellamy, Octavia, Monroe, Mel
6.      Arrow
7.      Power/Tesla
8.      Orchid
9.      Flint
10.    Aero
11.    Go Sci
12.    Prison Station is also known as the Sky Box and Lockup
*Russian and American flags are visible in 1x13 on the sides of the dropship.
On screen graphics in 1x13 thereâs Alpha, Arrow, Factory, Hydra, Mecha, Tesla stations as major parts of the Ark.
I think I reconized them properly (Alpha is hidden):
Airlock where Jake Griffin was floated has Chinese writing on it.
There is a Brazilian flag painted on the side of Mecha Station as shown when Abby and Kane go outside.
Japanese flag painted on the Skybox in 1x1.
- Season 1 starts when the 100 were sent to Earth on Saturday, September 13, 2149.
Sep. 18 - Clarke mercy-kills Atom
Sep. 24 - Octavia meets Lincoln, Raven lands on the ground
Oct. 11 - battle with Grounders and Ark coming down to the groundÂ
- Season 2 begins a day after season one and ends on November 3, 2149.
Oct. 16 - Bellarke iconic hug
Oct. 23 - Clarke kills Finn
Nov. 3 - Clarke says goodbye to Bellamy
- Season 3 begins after a time skip on January 27, 2150.
Jan. 28 - Bellamy finds Clarke
Feb. 6 - Bellamy and Pike murder the grounder army; Clarke confronts Bellamy.
Feb, 18 - Lincolnâs death,Â
Feb. 21 - Sinclairâs death, funeral
Feb. 22 - Bellamy and Clarkeâs âI was so angry at you for leavingâ talkÂ
Feb. 24 - Clarke shuts down A.L.I.E.
- Season 4 begins right after season three ends, Feb, 24, 2150.
Mar. 20 - Bellamy and Clarke have âIf I donât see you againâ talk.
Mar. 28 - Final Conclave, Roanâs death
Mar. 29 - Jasper commits suicide
-Â Season 5Â begins after a time jump of six years and seven days later.
Apr. 7, 2156 - Eligius ship lands on Earth
Source: http://the100.wikia.com/wiki/The_100_Wiki and my own research