- Sunset Sarsaparilla enters production.
- The Sierra Army Depot is created.
- September 2: World War II ends.
- July 21: A B-29 crashes into Lake Mead.
- May 5: Carl Bell in Defiance 7 becomes the first human in space. The flight lasting twelve minutes and seven seconds and making a full revolution around the Earth. Bell is killed when his capsule crashes on reentry.
- Sometime before this year, the United States divided itself among 13 commonwealths, adding a new layer of bureaucracy between the state and federal government. A new flag is created with 13 stars surrounding a central one.
- July 16: The United States sends astronauts Richard Wade, Mark Garris, and Michael Hagan to the moon.
- The West Tek research facility is established.
- The Delta IX rocket is commissioned by the U.S.S.A. The Delta IX rocket is the last of the manned rockets to the Moon.
- Hubris Comics begins publishing comic books, one of their most popular is Grognak the Barbarian.
- The original Vim! Pop factory burned down, prompting the rebuilding of the factory and eventually its recreation as a souvenir shop.
- After the tragic death of Emilia Butler, the Boston city council voted unanimously to have her remains interred within the Old Granary Burying Ground.
- The last manned mission to the Moon occurs.
- The Delta IX rocket is converted for U.S. military purposes. Crew and instrument sections are replaced with a nuclear warhead.
- The Mister Handy series of robots is first brought to market as a general construction and maintenance unit by General Atomics International.
- Prometheus Coal, a division of Poseidon Energy, opens a coal mine in central Utah. As a result a small village is settled nearby called Eagle Rock.
- An early bug in Mister Handy robots that caused interference in the operation of the multiple arms is fixed with a hardware update, with no major problems since then.
- The Tibbets Prison is commandeered by the United States government in association with Vault-Tec and Poseidon Oil to tie into their Project Safehouse. On April 5, 2040, the Secretary of the Army makes the decision to build a new Disciplinary Barracks, with a capacity for 456 inmates. A cost ceiling of $363 million in allocated construction dollars is set. The target budget year for funding this project is fiscal year 2041. Construction begins in fall of 2042, with completion projected for fall of the year 2045.
- August 16: Doctor Morrison Rand was abducted by aliens on-board Mothership Zeta when he was leaving the campus of Banfield College in Humboldt.
- June 25: Robert House founds RobCo Industries.
- John-Caleb Bradberton, an amateur chemist, began developing a soft drink that would provide energy, focus and 120% the daily recommended value of sugar.
- A major earthquake takes place in Mexico City. The Mister Handy general construction robot becomes the leader in sales in Mexico.
- July: discussions with Vault-Tec to determine space and functional requirements for the new Tibbets facility.
- Mass Fusion is founded.
- The formula of Nuka-Cola is perfected by John-Caleb Bradberton, after nearly two years of work and help from his Beverageers.
- The Great Passion Fruit Famine hits America. People actually notice the taste difference in Nuka-Cola when the passion fruit flavor was removed.
- The X277 "Viper" magnetic rail cannon developed for the U.S. Military by West Tek is deemed too costly to produce on a mass scale and abandoned.
- RobCo Industries becomes one of the most profitable corporations on Earth.
- May 1: Nuka-World is opened to the public with Nuka-Town USA and Kiddie Kingdom being the only parks. The theme park attracted more than 40,000 visitors at its grand opening.
- The mission of Sierra Army Depot is changed again. It is refurbished with the latest in technology and is from now on used as a secret research installation for developing and testing robotic, biological and conventional weapons until 2076.
- Seeking to protect business interests and their oil supply, the United States begins to exert increasing pressure on Mexico, citing the political instability and pollution stemming from Mexico as a threat to the United States. Various economic sanctions serve to destabilize Mexico, and the United States military enters Mexico to keep the oil refineries running and making sure oil and fuel continue to make their way north across the border...at Mexico's expense.
- The N99 10mm pistol becomes standard issue military sidearm following the phase out of the N80.
- The Weston water treatment plant was built as part of a decade-long plan to modernize Boston's aging sanitation systems.
- A television documentary revealing the withered husk of the Texas oil fields brings the oil shortage into American households and reveals how deep the energy crisis runs.
- The last manned space flight to the moon to be performed by the USSA takes place. On that flight, the astronauts recover the flag planted on the surface by the Valiant 12 team.
- The widely known Nuka-Colas Dazzling Blue bottle color was adopted as standard after market research programs indicated that the blue color was the favorite in 86 people out of a hundred polled.
- March 5th: The United States closes its borders.
- April: Resource Wars begin. Smaller nations go bankrupt as the European Commonwealth declares war on the Middle East in response to rising oil prices.
- May: The ailing United Nations begins to collapse. In a series of heated debates, many nations withdraw from the organization as the U.N. tries to keep the peace.
- July: The Linden Street slayings of the Pint-Sized Slasher take place.
- July 26: The United Nations is officially disbanded.
- The socially transmitted New Plague arises, killing tens of thousands. The United States closes its borders and the first-ever national quarantine is declared. The source of the plague is unknown, but rumors persist that it is a genetically engineered weapon.
- ZAX 1.0 goes online, developed by Vault-Tec Industries. Initially a prototype of some of the systems designed to govern the vaults, it is given to the government to help the Department of Energy collect resource data. Within a year, it is taken by the military for plague and tactical research; one version, ZAX 1.2, would later be constructed for West Tek.
- US Robotics Disposal is founded.
- December: Like an exclamation mark on the end of a very bad year, a terrorist nuclear weapon destroys Tel Aviv.
- REPCONN Aerospace is founded following the first launch of the Delta IX rocket.
- January: Limited nuclear exchange in the Middle East raises fears throughout the world.
- In light of the European-Middle Eastern War and the plague scare, the United States officially sets Project Safehouse in motion. The project, financed by junk bonds, is designed to create shelters, called Vaults, for the populace in the event of a nuclear war or deadly plague. Construction begins late in 2054 and proceeds rapidly due to advances in construction technology.
- West Tek Research Facility is established to continue work on a cure for the New Plague. Their viral research and close ties to the federal government eventually lead to them being chosen for the Pan-Immunity Virion Project twenty years later as well as power infantry armor and laser research.
- ZAX 1.2 is brought in to regulate conditions in West Tek. It is not part of the Vault-Tec preservation software, so it does not have any orders to protect humanity after the bombs fall. In the meantime, it calmly calculates data and plays chess with the scientists. Many scientists claim that ZAX is a "big ol' cheater" and draws the game out too much for a computer of his considerable abilities.
- The Integrated Human Resources Management System v2.3, a joint product of the District of Columbia Office of Software Management and the United States Office of Computational Organization, as part of a contract with Computechtron, was implemented.
- February: United States government removes the Grand Canyon's protected status as a national park.
- May: Uranium mining begins in the Grand Canyon. The Grand Canyon is closed indefinitely.
- March 15June 15July 15: Due to some shipping error, the Zion Canyon general store had yet to receive its supply of De-Luxe Mountain Man All-In-One Survival Kits, which it ordered three weeks prior. One month later the shipping companyinstead delivering the survival geardelivered crates of Dinky the Dinosaur(TM) Officially-Licensed Dino-Action Dolls. This blunder was a major loss for the store, causing it to have to sell these toys to regain its lost capital. These toys can still be found in the store in 2281.
- Isla Negra Holdings begins to take control of Point Lookout, Maryland as the New Plague devastates the region.
- The Dry Rock Gulch park of Nuka-World opens.
- The Anchorage Front Line is established, as the United States increases its military presence in Alaska to protect its oil interests. The Anchorage Front Line causes tensions in the United States and Canada, as the United States attempts to pressure Canada into allowing American military units to guard the Alaskan pipeline.
- The first artificial Intelligence is born. Limited by memory constraints, its expansion is rapidly halted. The discovery paves the way for future A.I. research in laboratories throughout the United States.
- Traffic on the streets of the world stops moving. Fuel becomes too precious to waste on automobiles, so alternatives are explored - electric and fission-powered cars begin to be manufactured, but factories can only make limited amounts while conserving fuel. Pressure on fusion research increases.
- The European-Middle Eastern War abruptly stops as the oil wells in the Middle East no longer produce oil. With the fields exhausted, neither side has a reason to continue hostilities. Both the Commonwealth and the Middle Eastern states are almost completely ruined by eight years of war.
- The European Commonwealth falls apart, reduced to hostile nation states, fighting over the remaining resources. The European Civil War begins.
- March: Construction of Vault 108 begins.
- May: Construction of Vault 92 begins.
- May, 3rd: A U.F.O. codenamed "Paladine" crashes just north of Hagerstown, Maryland, but could not be recovered.
- Despite quarantine measures, the New Plague continues to spread, fueling national paranoia.
- Wan Yang is arrested as a suspect in the Niagara Sabotage.
- Many Mormon congregations come together to purchase places in Vault 70, located in Salt Lake City.
- Dr. Willem Clark, a top nuclear physicist in his day, is put in charge of all scientific endeavors at the Reservation. Colonel Green, a career soldier in the U.S. army, is put in charge of security.
- August: The construction of most Vaults completed, except for Vault 13, whose construction finally gets off the ground heralding a development cycle that seems plagued with problems. Drills begin in the other cities with completed Vaults, but the increasing frequency of the drills has a "cry wolf" effect, and the turnouts for drills trickle off as the years go on.
- A photograph of Dr. Clark, Dr. Sebastian, and the Maniac AI surfaces during the lull between the remobilization of Los Alamos and the arrival of its new mission orders.
- March: Construction of Vault 106 begins.
- The Reservation is given orders to research and produce nuclear missiles that can be fired from an orbiting space platform.
- February: Construction of Vault 76 begins.
- April 14: M.A.R.Go.T. enters service.
- June: Due to enormous demands for electricity from a 17+ million population, a nuclear reactor in New York City goes supercritical, almost causing a meltdown. The near meltdown brings into effect power rationing, and the term "Hot Summer" is used to refer to this incident.
- August: Increasing need for mobility in the United States mechanized cavalry leads the military to focus the efforts on creating a man-based tank - essentially, a two-legged walking armored unit: power armor. Research grows until 2067 and several prototypes are developed, many of which prove to be unworkable in the field. These prototypes pave the way for future advances in military, construction, and fusion technology.
- The U.S. Army conducts a test of a next generation nuclear weapon, dubbed the Super Bomb by the media.
- The U.S. Navy missile cruiser USS Ebon Atoll is accidentally sunk by the U.S. Navy Submarine USS. Interference during the Anchorage Campaign. The Interference mistook the Ebon Atoll for an enemy vessel and shot it with a nuclear torpedo killing all on board. It is one of the worst U.S. Navy disasters since World War II.
- Resource rationing in Denver results in Food Riots, after the midwestern parts of the United States and Mexico cannot supply enough food for the population. National Guard units are called in to deal with the situation.
- Poseidon Energy shuts down the Eagle Rock mining complex due to the danger and expense. The installation is sold to the government.
- May: Construction of Vault 87 begins.
- Spring: As the oil resources dry up across the globe, China's fossil fuel dependency causes an energy crisis in the nation. China, bordering on collapse, becomes more aggressive in its trade talks with the United States. Unwilling to export oil to China, talks between the United States and China break down.
- June 24: Negotiations between the U.S. and other world powers come to a dramatic end, with the president walking out of oil talks with the other world powers. After a much heated debate, the president stormed out of the meeting and declared that the last known supply of petroleum will be used exclusively by the U.S. and the U.S. will not sell or trade any oil to outside parties.
- Summer: Adding further insult to the Sino-American relations, the first crude fusion cell is unveiled, one of the results of the power armor project. Devices designed for the fusion cell begin to be manufactured. Incorporating fusion power into the general U.S. infrastructure begins, but the process is too slow to supply power to the regions that need it. Nearly eleven years later, few sections of the United States were supplied with fusion power.
- December: In the winter of 2066, China invades Alaska. The Anchorage Front Line becomes a true battleground. The United States Congress unanimously passes and the then-President of the United States signs the U.S. Declaration of War on China, officially marking the beginning of the Sino-American War.
- December: As a sign of increasing tension between the two countries, Canada proves reluctant to allow American troops on Canadian soil or allow American planes to fly over Canadian airspace. American and Canadian tensions rise, but Canada eventually backs down, and U.S. troops pass through Canada. This sets the stage for the Canadian annexation in 2076.
- The first suit of T-45 power armor is deployed in Alaska. While lacking the full mobility of future versions, this power armor is incredibly effective against Chinese tanks and infantry. Its ability to carry heavy ordnance becomes key in various localized conflicts, and it has the power to destroy entire towns without endangering the wearer. China rushes to create its own versions, but they are many years behind the United States.
- The Safari Adventure park of Nuka-World opens.
- A Nuka-Cola machine can be found on almost every street in America.
- Senator Todd Peterson decides to build a secret bunker to house himself and his family should war break out. Senator Peterson is a wealthy man in his own right, but lacks the funds necessary for such a project. Through secret dealings with Poseidon Oil and a covert branch of the government known as the Enclave, the final funding for the project is attained. A construction site is chosen in southern Colorado and work begins.
- May: Construction of Vault 92 ends.
- November: Construction of Vault 112 begins.
- Canada begins to feel the pressure from the United States military as the U.S. draws upon Canadian resources for the war effort. Vast stretches of timberland are destroyed, and other resources in Canada are stretched to the breaking point. Many Americans refer to Canada as Little America, and Canadian protests are unheard.
- February 11: By order of the U.S. government, all Patriot's Cookbook magazines are banned and incinerated. However, many magazines still remained in circulation.
- March: Vault 13 is finally completed - it is the last of the Vaults on the West Coast, and drills begin. Due to its late completion, the "cry wolf" effect that hurt the other Vaults is not as pronounced.
- October: Construction of Vault 76 ends.
- December: Construction of Vault 106 and Vault 108 ends. Vault 108 was in construction for 8 years due to work stoppage.
- The first of the Chryslus Motors fusion-driven cars are developed. Reassuringly big and American, the limited models carry a hefty price tag but are sold out within days. Many Chryslus plants have long since been converted into making military ordnance.
- West Tek Research Facility is put under military command.
- Atomic Command is published by Planned Diversion Programming.
- December: Construction of Vault 87 ends.
- June: The United States Army confirms the development of a "Super Weapon" to liberate Anchorage Alaska.
- June: Ezra Parker prevents the assassination of Viscount Sergey Urbonas by diving between him and the shooter, ultimately being saved by a silver locket kept in his breast pocket.
- June 3: The United States' increasing demand for Canadian resources causes protests and riots in several Canadian cities. An attempted sabotage of the Alaskan pipeline is all the military needs as an excuse to finalize its annexation of Canada, which had already begun in 2067.
- The Galactic Zone park of Nuka-World opens.
- Journal-It Software is copyrighted by PagSoft LLC.
- Automatron is published by Planned Diversion Programming.
- Completed B.O.M.B. missiles are sent to different space centers around the U.S. so they can be carried into space and installed into the B.O.M.B. satellites. The process is slow, but it is being carried out fairly regularly.
- August: The Ballistic Orbital Missile Base, or B.O.M.B.-001, is completed and partially functional (for security and maintenance bots) using a temporary onboard generator. The only thing the base needs are the manually input final launch instructions and codes, and the main power reactor.
- September 15: As China becomes increasingly aggressive with their use of biological weapons, the United States government felt that a countermeasure was needed. The Pan-Immunity Virion Project is officially formed and plans are made to begin experiments at the West Tek Research Facility in Southern California.
- Despite claiming that it fights a purely defensive war, United States units are deployed to China. Long supply lines and difficult conditions on the mainland lead to the units becoming bogged down in fighting. American infantry, mechanized divisions, and power armor units suffer from strained resource and supply lines.
- The government turns the lower levels of Eagle Rock into a radioactive waste dump. Future founders of the Enclave help Poseidon Energy secure a contract for the operation, leading to the development of Agricola robots and the installation of a bunker on site.
- June: Construction of Vault 112 ends.
- July: Bloomfield Space Center is completed. It is tasked with building Hermes XIII and Hermes XIV, rockets meant to service B.O.M.B.-001 and -002 respectively. Originally meant for Mars missions, the rockets are instead to be used for installing the final elements of the orbital base (reactors), entering final launch instructions, and performing a final check of the station.
- The Sierra Army Depot A.I., Skynet, becomes self-aware.
- RobCo Industries copyrights the Unified Operating System. This system is used for operating the Robco terminals. The copyright is renewed for each of the next two years.
- RobCo brings up plans to purchase REPCONN Aerospace, threatening a hostile takeover otherwise.
- Red Menace is published by Vault-Tec Game Studios.
- Modern Industrialist awards Ezra Parker an engraved pocket watch for being selected in their Top 10 Up and Coming Venture Capital Managers list.
- March 21: PVP experiments continue at West Tek with batch 10-011, in the wake of successful tests of the virus on single-celled organisms. Experiments on plant cells are postponed. The pan-immunity virion is renamed Forced Evolutionary Virus (FEV).
- May 9: F.E.V. experiments continue at West Tek with batch 10-011, in the wake of successful tests on flatworms; the flatworms exhibit increase size and heightened resistance to viral contagions. Experiments with insects have less success, and further experimentation on insects is postponed by Major Barnett.
- May: Vault 112 seals two years early, for Stanislaus Braun's sadistic desires.
- June 30: F.E.V. experiments continue at West Tek with batch 10-011, with white mice as subjects. Increased size, muscle density, and Intelligence are noted.
- November 9: FEV experimentation (batch 10-011) on rabbits is concluded. Increased size, Intelligence, and (this time) aggressiveness is noted. Apparently, it was hard to determine whether the flatworms in the previous experiments were angrier and more violent than normal. Frankly, the researchers cannot be blamed for this.
- RobcOS v.85 is copyrighted.
- REPCONN Aerospace is bought out by RobCo Industries.
- January 3: A military team under the command of Colonel Spindel is sent to the West Tek research facility to monitor the experiments in the interest of national security, due to fears of international espionage. Captain Roger Maxson (the grandfather of John Maxson, the High Elder of the Brotherhood of Steel in 2161) is among the team personnel.
- January 12: Splicing in several new gene sequences into their test virus, dogs are injected with batch 11-101a at West Tek. Although increased strength was noted, increased intelligence was not. Using batch 11-011, experiments are conducted on raccoons. The same results are noted, but the attempted escape of several infected raccoons causes Major Barnett to terminate the escape... and the test subjects. Two pairs of raccoons, however, are unaccounted for. note
- January: The United States annexation of Canada is complete. Canadian protesters and rioters are shot on sight, and the Alaskan Pipeline swarms with American military units. Pictures of atrocities make their way to the United States, causing further unrest and protests.
- February: The M42 "Fat Man" Launcher begins development at Fort Strong.
- April 15: Once all secondary tests and studies are done on the test subjects, all dogs from the batch 11-101a Forced Evolutionary Virus (FEV) tests at West Tek are terminated... from a safe distance.
- May 24: Protectrons that were missing all their limbs were delivered to Robotics Disposal Site East 09B.
- June: Power armor T-51b series development is completed, resulting in the first mass-produced T-51 power armor. The first power armor units are sent to China, where they perform flawlessly against Chinese forces. Enemy tanks and infantry are no match for the power armor and sometimes they even surrender to the advancing forces when they realize what they are against. As a result, the Chinese war effort begins to collapse, its resources and supply lines strained to the breaking point.
- June 10: Eyebots that were missing their vision sensors were delivered to Robotics Disposal Site East 09B.
- July: Flotation Homes and Seaweed is published by Vault-Tec Industries.
- August: Food and energy riots begin in major cities throughout the United States. Military units begin to be deployed in cities within the United States to contain rioters, and many temporary prisons are constructed. A state of emergency is declared, and martial law soon follows.
- August: Hermes XIII and XIV are completed, loaded with cargo and placed on the Bloomfield launch platform, awaiting the final funding, and the okay to launch.
- October: Production of B.O.M.B. nuclear missiles is put on hold due to budget cuts. The Reservation is put on reserve.
- October: Due to the seriousness of world events and the threat of nuclear war, Hermes' launch is postponed while funds are routed to vault technology. Launch is rescheduled for 2077.
- October 2: John Miller proprietor of Big John's Salvage was finished sealing the cracks and clamping the pipes in the shelter he was building on his property.
- October 4: At West Tek, fifteen chimpanzees are infected with batch 11-111. The most successful test to date, growth and immunities in the chimpanzees surpass all other subjects to date. The military practically drools over the results. Plans are made in secret to begin testing in small quarantine towns in North America, and the Mariposa Military Base construction is sped up in anticipation of moving the West Tek project to a location under military supervision.
- November: Enclave personnel seize control of Bloomfield Space Center and begin researching and developing a way to convert Hermes XIII and 14 into a personnel transports to transport important individuals off-planet.
- September 5: John Miller proprietor of Big John's Salvage was finished installing the ventilation in his shelter, however he was continuing to have issues with the generator. It kept shutting off for no obvious reason, and whenever the generator shut off the ventilation fans would stop and effectively vacuum seal the shelter.
- November 16: Twelve Protectrons that were missing all their limbs were delivered to Robotics Disposal Site East 09B.
- November 28th: John Miller proprietor of Big John's Salvage believed that he fixed the generator/ventilation issues, and all the supplies are stocked and ready.
- December: Fifteenth edition of Coping With Mr. Virus! is published by Vault-Tec.
- Gas prices sky rocket with the regular gas price being $7450.99 per gallon and $8500.99 per gallon for premium.
- The U.S. Army commissions General Atomics International to manufacture the Mister Gutsy line of combat robots. The Mister Gutsy line is completed just before the Great War and are released for use.
- Robert House puts himself in stasis.
- A Chinese sabotage attempt takes place at Hoover Dam.
- New Plague hits Denver. Rioters burned down large parts of the city in their fear of contamination and anger at their treatment. Many panicked and fled the city by car, clogging the freeways when they ran out of gas and trapping everyone behind them.
- January 7: Major Barnett orders transfer of all Forced Evolutionary Virus (FEV) research to the newly-constructed Mariposa Military Base, despite objections by the research team.
- January 10: Alaska is reclaimed, and the Anchorage Front Line is again held by the Americans.
- January 22: The first domestic use of power armor within the United States for crowd and quarantine control. Units originally serving in China and the Anchorage Front Line find themselves fighting Americans at home. Food riots increase, and many civilians are killed. Several soldiers defect from the military both in Canada and the United States. They are captured, and are sent to military prisons.
- February: F.E.V. Research is leaked to the world through an unknown source. Protests in many major cities and governments around the world, as well as accusations that the U.S. was responsible for the New Plague. F.E.V. is seen as the threat, and serves only to fuel tensions. The governments of the world fear what the U.S. is up to. Speculating anything from trying to make a breed of super soldier, to trying to make Hitler's master race, they begin to panic.
- February 16th: The testing of the Archimedes I weapons system was successful. However, despite precautions being taken, several minor systems were overloaded. Furthermore, both the Black Mountain communications array and the Hidden Valley military bunkers experienced system frying power fluctuations at the time of the testing. However the Archimedes II testing was pending the long-range communication/targeting system on the Euclid's C-Finder.
- February 22nd: The Army takes control of the HELIOS One installation in Nevada from Poseidon holdings. Full use of the laser artillery enters the American arsenal.
- March: Prepared for a nuclear or biological attack from China, the President and the Enclave retreat to the Poseidon oil rig and make contingency plans for continuing the war.
- March: Vault Dweller's Survival Guide is published by Vault-Tec.
- March 14: Twenty seven defective Mister Handys are delivered to Robotics Disposal Site East 09B.
- April 2: John-Caleb Bradberton undergoes the Project LEAP-X procedure, preserving his head in a jar beneath his office at Nuka-World.
- May 24: Nine protectrons that were missing all their limbs were delivered to Robotics Disposal Site East 09B.
- June 8: Fourteen Eyebots missing their vision sensors were delivered to Robotics Disposal Site East 09B.
- June 15: Eight Robobrains whose mental acuity was well blow standard were delivered to Robotics Disposal Site East 09B.
- June 22: Several decommissioned sentry bots were delivered to Robotics Disposal Site East 09B.
- July: Between July 10 and October 23: Sierra Army Depot is evacuated.
- July 22: Four decommissioned Sentry bots were delivered to Robotics Disposal Site East 09B.
- August: Sometime prior to August 15, General Constantine Chase, the hero of the Anchorage Reclamation, begins testing a virtual reality simulation of the Reclamation at the V.S.S. Facility in Washington, D.C.
- September: The M42 "Fat Man" Launcher is perfected and shipped out out Fort Strong to "the supply yard in Mississippi."
- September 6: Technicians at the V.S.S. Facility notice General Chase is making radical, unrealistic changes to the Anchorage simulation. They believe Chase is becoming obsessed with the simulation and is gradually going insane, but refrain from confronting him out of fear that they will lose their jobs to military contractors.
- September 9: Fifteen Protectrons that were missing all their limbs were delivered to Robotics Disposal Site East 09B.
- September 13: Employees of Robotics Disposal Site East 09B discovered their collegues at other facilities also received shipments of Protectrons missing their limbs.
- October 10: Captain Roger Maxson and his men discover that the scientists at Mariposa have been using "military volunteers" (military prisoners who didn't have their brains scooped for use in robobrains) as test subjects in their experiments. Morale in the base breaks down, and in light of the mental breakdown of Colonel Robert Spindel stationed at the base, Maxson's men turn to him for leadership.
- October 13: After an interrogation, Maxson executes Robert Anderson, the chief scientist at Mariposa.
- October 15: Colonel Spindel commits suicide.
- October 15: Robotics Disposal Site East 09B receives a mysterious delivery by even more mysterious men in black.
- October 18: Scientist executions at the Mariposa come to an end.
- October 20: Captain Roger Maxson, now in control of Mariposa, declares himself to be in full desertion from the army (via radio)... and receives no reply.
- October 20: Employees of Robotics Disposal Site East 09B discus the prospect of loosing their careers if they look into their last recorded delivery.
- October 21: Maxson orders all families stationed outside the base moved inside the Mariposa facility.
- October 22: The Platinum Chip is processed. It is due to be delivered via courier to Mr. House the next day.
- October 23: In the early morning (U.S. Eastern Standard time), the Great War begins, triggered by an unknown party. The United States and China deploy their nuclear arsenals. Other countries, seeing the missiles on their way, launch their planes and fire their warheads as well. Air raid sirens sound, but very few people heed the warning. The vaults are sealed. Two hours of nuclear bombardment later, the War ends, along with much of humanity.
- Fallout 4 prologue begins.
- L.O.B. Enterprises is raided by federal agents.
- A pre-Halloween costume show, called Freddy Fear's House of Scares was scheduled later that day in Washington, D.C.
- Nuka-Cola Quantum is released to the public, trucks leave the factory to make deliveries.
- 82 students from the Early Dawn Elementary school go on a field trip to Lamplight Caverns with a couple of teachers and a few parent chaperons.
- Randall Clark witnesses the destruction of Salt Lake City and, by extension, the death of his family. The city is hit by thirteen nuclear warheads, resulting in total destruction.
- Mr. House saves Las Vegas and most of the surrounding area from complete destruction with his defenses at the Lucky 38, stopping 68 of the 77 ICBM's launched at Las Vegas (59 through forced deactivation and 9 destroyed with laser cannons mounted on top of the Lucky 38). The resulting "light show" can be seen as far as Mexico City. Nine of the warheads evade destruction, a fault of Mr. House being forced to use an inferior operating system without the Platinum Chip, but only damaging minor parts of the Mojave Desert, with the most damaging detonation being near Nellis Air Force Base.
- The Sierra Madre gala event begins, but is cut short by the war. The casino hermetically seals itself and the holographic security murders many of the guests. The few scattered survivors eventually commit suicide in the following hours and days. Vera Keyes dies from an overdose of her pain medication, while Frederick Sinclair dies in his attempt to disarm his traps. The only known survivor is Dean Domino.
- Vault 12 fails to close properly. Once it becomes known that the other vaults have sealed, people within Bakersfield attempt to force their way into Vault 12 to protect themselves and their families.
- The West Tek Research Facility is hit by warheads, breaking open the F.E.V. tanks on levels four and five and releasing it into the atmosphere. Mutated by radiation, it loses its mutagenic abilities, but it later complicates things for the Master.
- The Mariposa Military Base survives; the soldiers within protected from the radiation and FEV flooding the wasteland.
- Surviving scientists and soldiers based in Los Alamos band together with other survivors they encounter for safety. They set up a temporary camp in a cliff dwelling at Mesa Verde and attempt to contact the federal government for further instructions. No contact is ever made. A small vault is built into the cliff side to shield the only computer they have from the elements.
- All Enclave personnel leave Bloomfield to either take cover or maintain "hot spots". Sub-reactor is turned off. Bloomfield, B.O.M.B.-001 & 002, and Hermes XIII & 14 are completely forgotten
- Two Poseidon scientists are trapped in the AGRICOLA Lab. After four years, one dies of natural illness. After one more year, the other commits suicide.
- Due to seismic activity, some radiation seeps into the sub-levels of the Reservation. Even though the people underground are safe from the blasts, radiation eventually takes its toll.
- October 25: At Mariposa, Platner, bound in power armor, is sent out to get specific readings on the atmosphere. He reports no significant radiation in the area surrounding the facility.
- October 27: After burying the scientists in the wastes outside of Mariposa, the soldiers seal the military base, then head out into the desert, taking supplies and weapon schematics with them. Captain Maxson leads his men and families to the government bunker at Lost Hills. note
- October 28: After having wandered for five days, Randall Clark takes refuge in a former USGS research station inside a cave in Zion Canyon.
- October 30: A black rain begins to come down in areas across the United States and likely the globe, causing a spike in radiation levels in affected areas. The rain lasts four long days, killing thousands of species who had managed to survive the war.
- November: Captain Maxson, his men, and their families, arrive at the Lost Hills bunker a few weeks later, suffering many casualties along the way, including Maxson's wife (but not his teenage son). The surviving soldiers go on to become the Brotherhood of Steel.
- November: During the Exodus, a faction within the Brotherhood of Steel led by Sergeant Dennis Allen breaks off to explore the southeast Glow to recover technology. The Captain refuses to permit that, so Allen and his separatist group splits away from the Brotherhood of Steel, taking power armor and weapons with them.
- November: The separatists make their way to the West Tek research facility. They arrive there twenty days later, and are promptly chewed apart by the West Tek's unforgiving automated defense systems. Wounded, Allen begins to suffer radiation poisoning from a leak in his suit. Before he dies, he logs what happened to the expedition into a holodisk.
- November: Ms. Carrie Delaney is the last adult to leave Little Lamplight Caves in search for help. Ten year old child Jason Grant takes charge in her absence.
- January 810: What sounded like a two day windstorm occurred in Zion Canyon, the radiation dropped 500 rads.
- January 15: Glowing green snow fell in Zion Canyon.
- January 2830: The background radiation in Zion Canyon is finally low enough for Randall Clark to explore outside the USGS research station. He quickly finds himself to be the only living thing in the immediate vicinity.
- The dwellers of Vault 87 are locked in airtight chambers and exposed to the FEV by the Vault's Overseer and his security, who are simply, though callously, following the "plan" laid out by Vault-Tec. The vault's population is transformed into super mutants.
- The city of kids, Little Lamplight is officially founded. By unanimous vote Jason Grant is named as the city's first mayor.
- The first effects of radiation are seen in the survivors. Widespread mutations occur with animals and humans alike. Those that survive the effects of the mutations are permanently changed. New species are created almost overnight.
- John Bloch's military group makes a peace-protection pact with local ranchers.
- Summer: The city of Necropolis founded by the ghoul survivors of Vault 12 (and the US citizens that fled to Bakersfield when the bombs fell).
- Spring: Set takes control of Necropolis, wresting control from the original Overseer. The Vault 12 Overseer, not willing to take a dirt nap, is driven north and history loses sight of him.
- Vault 29 opens. Harold (now human) sets out to make his fortune as a trader, making the circuit around the survivalist communities in the wasteland.
- Vault 8 opens, and they use their GECK to create fertile ground for their city. This eventually becomes Vault City.
- LA Vault opens, the Boneyard is founded and attracts survivors.
- Dr. Richard Moreau is exiled from Vault City for murder. The circumstances surrounding the murder are unknown, but he changes his last name to Grey and heads south.
- The Hub is founded by a man named Angus, who sets up camp around a filthy oasis in the desert, and he proceeds to begin trading with other settlements.
- Harold rises to the level of a caravan boss in the Hub. His caravans suffer occasional attacks in the wastes, but Harold's caravan outfit survives and prospers... until the mutant attacks begin to pick up a few years later.
- John Maxson, the future High Elder of the BOS in Fallout 1, is born.
- May 22: Increasing mutant attacks on Harold's caravans cause Harold to get so pissed he finances one of the first adventuring parties of Fallout to try and find out where the mutants are coming from. Consulting with a scientist and doctor at the Hub, a man by the name of Grey, the two of them decide to join forces.
- June 23: Richard Greys Expedition [including Harold] finds the Mariposa Military Base and the Expedition is scattered and defeated by mutants at the base. Grey is knocked into one of the vats of FEV by a robotic arm, and Harold is knocked unconscious, only to awaken later out in the wasteland.
- June 27: Harold, already mutating, is found by traders and taken back to the Hub. His former caravan partners and employees, horrified by his condition, abandon him and he is soon left without even two bottlecaps to rub together.
- July: Richard Grey, now horribly mutated by the virus, crawls from the Vats covered with FEV and in terrible pain. Barely able to think or perceive his surroundings, he crawls into the Vat control room and begins his audio log. He fades in and out of consciousness, sometimes for days or weeks at a time.
- July-November: Richard Grey begins to acclimate to his condition, and begins his first tests of animals by exposing them to FEV. These experiments and his growing awareness lay the foundation for his plans for the Unity and the master race. He takes the name, "the Master."
- November: The first human victim wanders into Mariposa, and Grey consumes him.
- December: Grey continues his experiments on wanderers that enter Mariposa...with no success. The creations are flawed (due to the radiation counts in their bodies), making them big but incredibly stupid, and Grey consumes them rather than letting them live
- January: The Master discovers the problem with the influence of radiation on his mutations, and he begins to choose his subjects more carefully. The first classic super mutants are born, butt-scratching animations and all. He begins his plans to build an army. Throughout this period, the Master begins slowly gathering test subjects, willing or unwilling, from local human stock. The Great Winter of 2130 and the scarcity of human subjects make building his army difficult.
- Angus rules over growing Hub and establishes himself as governor.
- Winter: Angus is murdered. Hub is thrown into chaos.
- A band of merchants seizes the water tower in the Hub. They demand anyone wanting water must pay a toll. The Great Merchant Wars begin.
- The Great Merchant Wars end. A man named Roy Greene (Justin Greene's grandfather) makes the peace and negotiates a settlement. The Hub's Central Council is formed, composed of two representatives from each of the Hub caravan companies. A long period of indecisiveness and meetings maintain the status quo in the Hub.
- The Great Winter occurs, covering the entire Earth in snow.
- The Master begins ordering his super mutants to gather human stock from caravans. For many years, the caravan disappearances are blamed on monsters in the desert, and even when the abductions begin to occur on Hub caravans, the deathclaws are blamed. The super mutant army grows.
- Elder Roger Maxson dies of cancer, and his son, already an accomplished soldier, takes up the role of "General" (Elder) within the Brotherhood of Steel. John Maxson becomes a member of the Paladins, showing tremendous promise as a soldier.
- Master's begins to mass-produce super mutants. Only about one in six or one in five attempts are successful, and of these successes, only half seem to last to go on to be part of his growing army, called the Unity.
- Decker forms Underground in the Hub and starts pulling strings
- Spring: Vault 15 opens.
- Around this time, the Vault Dweller is born.
- Winter: Raiders begin to form in the region as food supplies run low. The Khans and the Vipers begin terrorizing local settlements.
- Spring: Shady Sands is founded.
- Tandi is born.
- As their influence slowly spreads throughout the wastes, the Master finds humans, doomsday cultists, and rather than dip them in the vats, he demands their obedience as spies - their leader is a man named Morpheus, and he pledges his followers to the Master. Morpheus and his cultists form the future core of the Children of the Cathedral.
- John Maxson's father dies in a raid by the Vipers. Expecting the raiders to break and run, Maxson doesn't take into account the religious ferocity of the Vipers (or their poisoned weapons), and when a single arrow nicks him with his helmet off, he dies within hours. John Maxson takes up the role of Elder, and Rhombus becomes the new head of the Paladins.
- After capturing a caravan of strange-garbed travelers (vault dwellers), Master learns the location of the Boneyard Vault, the future site of the Cathedral. He conquers the inhabitants and sets up operations there, and the human cultists begin to use the Vault as their powerbase. Within the Vault, the Master learns of other Vaults, and realizing their human occupants are ripe for transformation, begins to send out patrols to Vault locations in search of these other Vaults.
- The Master sees advantages in establishing a benevolent "religion," the Children of the Cathedral, and using them as spies in settlements throughout the wastes. Missionaries from the Children of the Cathedral spread slowly across the wasteland, acting as eyes and ears for Morpheus and the Master.
- The Master learns the location of the Bakersfield Vault, Vault 12, and sends a detachment of super mutants there to seize the vault. Many ghouls are snapped like twigs in the attack, and Set finally parleys with the super mutants, telling them that the ghouls are the Vault survivors the super mutants are looking for. The super mutants, angered at failing to find an intact Vault, set up a small garrison at the watershed to watch the inhabitants and insure Set's... cooperation in the war to come.
- October: A Brotherhood of Steel patrol comes across a dead super mutant in the badlands. They take the corpse back to the Scribes, and Head Scribe Vree begins her examinations of the super mutant.
- December 5: Fallout begins. The Vault Dweller is sent out of Vault 13 to find a replacement for the broken water chip.
- December 15: The Vault Dweller discovers Shady Sands. Meets Tandi, and Ian, who joins the Vault Dweller in searching for the water chip.
- December 30: The Vault Dweller recruits Dogmeat in Junktown.
- January 17: The Vault Dweller reaches the Hub and negotiates with the Water Merchants to deliver water to Vault 13, buying the Vault some time.
- February 13: The Vault Dweller recovers the water chip in Necropolis. Ian is killed by a super mutant and reduced to a cinder, ending his tendency to shoot the Vault Dweller in the back with SMG bursts.
- March 3: The Master is killed by the Vault Dweller.
- April 20: Vault Dweller destroys the Military Base. Dogmeat dies defending his master.
- May 10: Vault Dweller returns to Vault 13, only to be told "you're a hero, and you have to leave." Some members of the Vault (led by Lydia, the head of the "return to the surface" faction, and including her supporters, Theresa and Lyle) follow soon afterwards.
- May 12: Vault Dweller removes the Vault suit and from this day forward, never wears it again.
- July 10: Vault Dweller heads North with a small group of Vault-dwellers and wastelanders and founds the small village of Arroyo.
- August 18: Construction of Arroyo completed.
- Summer: At high noon, Marcus and Brotherhood of Steel Paladin Jacob cross paths many, many miles southwest of Broken Hills and punch and shoot each other for a few days. Eventually, they give up, unable to get an advantage over the other. The two start traveling together, arguing over Master and BOS doctrine and whether or not the Master could truly neurolink his biology into the Cathedral computer network.
- Fall: Marcus and Jacob, along with the trail of ghouls, humans, and super mutants, found the community of Broken Hills.
- Spring: Jacob moves on, says goodbye to Marcus, then moves on for parts unknown.
- The New California Republic formed, and a central council is created as a governing body.
- October 2: Vault Dweller has a daughter.
- Tandi unanimously elected President of NCR by the NCR council.
- Enclave works on various new technologies, including Power Armor variations. None of these are much of an improvement over the conventional old school Power Armor, and some are actually worse.
- January 16: After writing their memoirs, Vault Dweller vanishes from Arroyo and is presumed dead. The Vault Dweller leaves the Vault Suit behind, folded on the bed. Some say the Vault Dweller was taken by the sky spirits, others say that the Vault Dweller felt it was time to move on and leave the Elders to guide Arroyo to its destiny.
- February 2: The One-Moon (Month) Cycle of mourning for the Vault Dweller ends, and activity in Arroyo begins to return to normal. Final training of the Vault Dweller's daughter for the role of village elder begins. She undergoes a great deal of physical training and tutoring in various sciences, mathematics, and, of course, weapon skills.
- January 31: Vault Dweller's daughter takes her mystic test, a key ingredient of which is several pots worth of hallucinogenic plants from Hakuinns garden. She runs the gauntlet in the Temple of Trials, using her charm to pass most of the tests after her handgun jams (and is ruined) on the first level. She offers numerous criticisms of the test, resulting in many revisions.
- February 2: Vault Dwellers daughter ascends to role of Village Elder. She rules with a steady hand, and her wisdom is greatly respected.
- Frank Horrigan is born.
- August 1: Congressman Richardson rises to power within the Enclave, aided by pressure from his father, President Richardson.
- Under Presidential Order, Enclave scientists begin to work on an upgraded version of Power Armor. Many prototypes are developed and tested.
- March 5: Congressman Richardson is elected president for the first term of five, through aid and political pressure by his father (President Richardson.
- October: Enclave scientists develop a reliable version of the Mark II Power Armor. The prototype results (and accidents... and explosions... and deaths) are classified by order of the President Richardson for the sake of morale.
- March 23: The Chosen One is born.
- Melchior's son is born.
- The Enclave experiments on deathclaws, attempting to create special fighting units for waging war in hostile environments
- While there had already been a small number of ghouls in Gecko at this time, more come to the area, and the town of Gecko is formed. The new influx of ghouls bring scavenged technology and know-how, and the power plant in Gecko becomes operational later that year. Vault City looks upon their new neighbors with growing concern.
- July 20: Enclave scouts discover the remains of the Mariposa Military Base and find it partially destroyed.
- July-August: Enclave scientists and chemical corps scour the remains of Mariposa, while assault squads comb the desert for slaves they can use to mine the military base and get to the Vats. One of the squads includes soldier Frank Horrigan, 25 at the time, recently removed from duty on the President's secret service to take some RNR time in the wastes after some undocumented psychotic blunder or another
- August: Melchior is captured by an Enclave patrol and becomes part of the slave mining force at the Military Base.
- September: Enclave construction crews and super mutant slaves begin excavations. They uncover the FEV virus, and mutations begin to occur in the human workers. Frank Horrigan comes into contact with the FEV and is sent to the Enclave labs for study.
- October: Melchior begins to mutate... but keeps his intelligence and cunning in the wake of the transformation, making him pretty smart for a super mutant. Realizing that the Enclave will kill the super mutants after they get the FEV data, he begins to use his magician talents to secret away weapons for the mutants to defend themselves when the Enclave decides to dispense with them.
- January: Enclave, having obtained the FEV data, abandons the Military Base site after more mutations occur, causing 2nd Generation Super Mutants to arise - the Enclave leaves a single squad behind to wipe out the super mutants, but the mutants, using armaments they have cached in the base during excavation, reduce the squad to ashes after suffering heavy casualties. The remaining 1 st and 2nd Generation super mutant slaves decide to remain in the Base, and the group forms a new community.
- Horrigan mutates from exposure to FEV, gaining the physique and slow, stupid, single-mindedness of a super mutant. He is kept heavily sedated, operated on, and studied. He is conscious for only brief periods at a time, then quickly sedated after the bloodshed is over.
- Harold arrives in Gecko, and (with a lot of shaking of his head) he does his best to help the ghouls with the running of the Nuclear Power Plant.
- January 23: Tests begin to run dry on Frank Horrigan. It is suggested that he be used as a field operative and be used in tests in the wasteland against local populations.
- March 27: Frank Horrigan is manufactured for his new role. A new version of Power Armor is built to accommodate his mass, and he is sealed inside. After a few horrifically successful field tests, Horrigan becomes the Enclave's solution to numerous sticky problems.
- The worst dry season in many years causes a drought in the Northern California area, hurting crops and brahmin in both Arroyo and Modoc.
- January: The first samples of Jet begin to arrive in Redding, courtesy of the Mordino family.
- February: Vault City rejects offers of an alliance with both the Bishop family of New Reno and NCR.
- March: Raider attacks on caravans to Vault City begin.
- July 25: Fallout 2 Begins: Chosen One begins his mystic test, descending into the Temple of Trials.
- July 27: Chosen One leaves Arroyo in search of the GECK.
- May 15: Enclave sends a coded sequence to Vault 13, activating its central computer and declaring that is time to leave the Vault. Martin Frobisher gathers the Vault dwellers together for tutorial movie.
- May 16: Less than a day later, Vault 13 is opened, only to be greeted by two Enclave verti-assault squads. The squads kill three of the citizens who were "resisting capture," and storm the Vault, kidnapping all the inhabitants.
- May 17: Enclave animal handlers drop a Deathclaw unit into Vault 13 from a safe distance to kill anyone investigating the Vault and cloak the Enclave's presence. Other Deathclaws are sent into the desert surrounding Vault 13 to check for any escapees or witnesses.
- Fall: The Chosen One enters the Enclave using the damaged tanker and destroys the Poseidon oil platform, killing the President of the United States. The remains of the Enclave scatter.
To be completed...