Timeline
The timeline will be based on the Fallout official timeline.
http://fallout.wikia.com/wiki/Timeline if you don't see certain parts of the lore mentioned, especially critical parts, it's safe to assume that the lore is the normal outcome in the timeline
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2277,
The Lone Wanderer leaves the Vault in search of their father.
Enclave forces in Alaska are locked in a seemingly endless war with a large army of Chinese remnants.
Raven Rock is discovered, but not destroyed, becoming a research station for the Brotherhood of Steel.
Enclave Forces of Raven Rock flee to Adam's Airforce Base.
Through a long journey the Lone Wanderer helps activate Project Purity.
The ancient book, known as the 'Krivbeknih' appears on auction in a large raider fortress, known only as the 'Reserves'
The Lone Wanderer meets Werner, and travels to The Pitt, while in The Pitt the Lone Wanderer chooses to aid Ashur, Werner is ultimately executed. Ashur attempts to uphold his promise, beginning to trade high quality metals to the wasteland.
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2278,
The Brotherhood of Steel begins "Operation: Steel Rain" an assault on Adam's Airforce Base, the Mobile Base Crawler is captured, Adam's Airforce Base becomes a Brotherhood Airbase.
Enclave survivors flee Adam's Airforce Base, attempting to reconnect with a hidden Enclave base in Alaska.
The Pitt slowly becomes an economic power house, Slaves are freed in exchange for legitimate laborers, mercenaries begin to guard The Pitt, a civil war occurs, the once loyal Pitt Raiders attempting to dethrone Ashur, ultimately Ashur's new mercenary army stomps out all resistance.
Elder Owen Lyons dies of natural causes, and is succeeded by his daughter Sarah Lyons, though it doesn't last long, as she is ultimately killed in action, a series of ineffectual leaders take the chair of Elder over the following years.
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2281,
New Canaan is destroyed, scattering many Canaanites across the Utah wasteland.
The Courier is ambushed, and shot in the head, but manages to survive.
The Courier manages to retrieve the platinum chip, having killed Benny in his penthouse.
The Pitt begins trade with the Brotherhood of Steel, supplying great amounts of refined metals, Ashur runs a "War game" seeming to simulate an attempted brotherhood assault on The Pitt.
The Courier goes with the Happy Trails expedition trip, assisting the Sorrows, and Dead Horses in their war, the white legs ultimately retreat back to the great salt lake, the 80s tribe ultimately over run the white legs, destroying much of their tribe.
The Sorrows learned that Retribution could be tempered by mercy, the Dead Horses return to Dead Horse point, as the years went on periodic small tribal wars erupted, and the New Canaanites would intervene as mediators, finding it increasingly difficult to lessen the conflicts.
The Dead Horses fought back the 80s tribe, opening trade routes through highway 50, Happy Trails Caravan Company sets up new locations along highway 50.
Small divisions of Enclave Forces are spotted across the wasteland, reports of Enclave Forces are pursued zealously by the Brotherhood of Steel, but very rarely are any enclave units caught, or killed.
the Courier assists the NCR, killing House, and driving Caesars Legion out of the Mojave, in the battle of Hoover Dam Caesar is assassinated, the demoralizing defeat causes a full-scale retreat, President Kimball is assassinated.
The Courier attempts to turn the Securitron army on the NCR, succeeding at first, the NCR being routed with major casualties.
The NCR retaliate, invading the Strip with a full ground force, branding the Courier as a terrorist, the Courier flees the strip.
Unrest grew in Freeside and Outer Vegas, which would eventually become full-scale rebellion, many rebels are captured by the NCR, and imprisoned within the Lucky 38.
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2282, The Fall.
The Pitt forms it's own mercenary company, utilizing makeshift power armor manufactured with The Pitt, as well as refined, and improved weaponry, the "Mill Mutts" become almost as feared as the Talon Company.
Under the guidance of Lee Oliver the NCR begin to ramp up operations within the Mojave, utilizing the 33rd Infantry.
The NCR discover the Sierra Madre, taking large samples of Cloud dust, as well as 'deceased' ghost people.
The NCR establish a makeshift lab within the Lucky 38.
The NCR are alerted to the approach of a record breaking sand storm, but don't alert the local population to it, and instead begin to prepare evacuation procedures.
The Courier stumbles upon The Divide, in their final battle with Ulysses, the Courier fires both of the nuclear weapons, striking Highway 15, and Drywells
Inhumane experiments are conducted on captured rebels within the Lucky 38, any dissident that is captured, and brought in are never seen again.
As the sand storm struck the mojave a disgruntled scientist sabotaged the massive cloud containment units, as the cloud dust spread across the strip, The peak of the rebellion erupted, engulfing all of Vegas in riots, and chaos, NCR troopers chose to execute anyone in sight, innocent citizens, and rioters alike, The Kings tried to evacuate as many people as they could, with the assistance of the Followers of the Apocalypse, the NCR began to flood the sewers with radioactive waste, stomping out any potential rebel survivors, their final action near the strip was blocking off the gates, locking any survivors inside.
The NCR troopers piled into the strip's monorails, evacuating the area.
Whole settlements and towns were evacuated or otherwise destroyed. One settlement in particular, Goodsprings, was struck by an unknown form of plague, killing most of its residents and turning the once-prosperous community into a ghost town.
Other areas, such as Boulder City, attempted to protect themselves with the same suits worn by Ghost people in Vegas and the Sierra Madre, ultimately becoming trapped themselves.
The Followers of The Apocalypse tried to hide, and return to rescue as many people as they possibly could, they saw many of their associates flee, only considering their own lives.
As predicted by Ulysses, the Tunnelers from the Divide eventually burrowed through to the Mojave Wasteland, causing even more death and destruction. The dust storms blotted out the Sun, allowing the Tunnelers to hunt by day, and night. Killing off most of the native animal population in the Mojave.
The ultimate effects of the Fall would spread as far out as Zion Valley, where spore carriers from Vault 22 ran wild, alongside another strange, terrible creature.
Titus Vitellius Augustus is elected Dictator, and begins his reign over the Legion a splinter faction within calling themselves the "Julian Praetorii" break off from the Legion, staying true to Caesar's doctrine.
Upon Lee Oliver's return to the NCR, he's put on trial for crimes against humanity, and is stripped of his rank, and executed.
The 33rd infantry remains in the Mojave, protecting 'NCR' resources.
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2283.
Arthur Maxson, having proven himself as a worthy leader, possessing a strong will and a knack for diplomacy, is made the Elder of the east coast brotherhood by the high elder, and the consulate of the west coast brotherhood, and the youngest elder in Brotherhood history.
Arthur Maxson begins to recant Elder Lyon's initiatives, making protecting wastelanders less important than recovering technology, successfully causing the Outcasts to rejoin with the brotherhood itself, though despite this order he maintains a caring, and protecting nature for wastelanders, he explicitly ordered that all technology was to be traded for food and medicine, and violent confrontation was to be a last resort.
Titus Augustus makes changes to the Legion's laws, and conduct, and begins to move toward diplomacy, while maintaining a vast army, slowly conquering opponents of the legion east-ward, sending scouts into the north.
Within the legion's borders coups are attempted rarely, but often fail, those who perpetrate the coup are swiftly made examples of.
The New Legion attempt to unify with the Julian Pretorii, but ultimately leads to heated tension rising in their borders.
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2285.
The Followers of the Apocalypse that fled the ruins of the Mojave travel north, eventually finding an old vault in Wyoming, taking up the mantle of "The Section" devoting themselves to the combating of pathogens, chemicals, and environmental hazards, as well as finding the ability to produce new pharmaceuticals within the vault.
A unstable peace is brokered between the New Legion, and the NCR, following the treaty a civil war goes into full swing between the Julian Pretorii, and the New Legion.
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2287.
The Sole Survivor awakens from Stasis, emerging from Vault 111, and begin to track down Kellogg, and Shaun. Eventually finding Kellogg, and killing him.
The Brotherhood of steel arrive in the Commonwealth.
The Sole Survivor finds, and kills Z2-47, extracting his courser chip, building a teleporter, and entering the institute, within the institute the Sole Survivor is horrified by what they discover.
The Sole Survivor ultimately joins the Brotherhood of Steel, and assaults the institute, and capturing the facility, much of the facility is damaged, but captured institute scientists are forced to assist the brotherhood in repairing the facility.
The Brotherhood of Steel establish a permanent operating base in the Commonwealth, and begin to comb through the ruins of the cities, eliminating raiders, and mercenaries alike as they encounter them.
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2290.
The town of Darwynn is settled somewhere in Wyoming, primarily by agents of "The Section" as well as refugees fleeing from the Nevada region, the settled region having great deals of roving gangs, as well as profiteering companies seeking new frontiers, Salus' first mayor Thaddeus Barnett is elected.
Thaddeus Barnett begins to elicit trade deals with local tribes, and sends scouts across the region.
Salus is attacked by a large gang of raiders, 60% of the population is killed, the rest are left to gather resources as a vessel to the raiders, known only as Great Roaches, forcing the Salus Settlers to give monthly offerings, in exchange for "Protection"
NCR scouts begin to comb through the region for the remains of military bases.
New Legion scouts are spotted in the region, seeking more territory.
Immigration to the region is seen, caused primarily by instability in other regions.