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Historical Record
On 23 October 2077, the long crisis between the United States and China reaches its final and catastrophic conclusion. Fallout records this date as the Great War, the day the nuclear exchange begins and the old world collapses. Civil defense systems activate, emergency broadcasts cut across regular programming, and families rush toward the nearest shelter. In the pre war American record seen at the start of Fallout 4, the alarm comes with almost no warning at all. A suburban morning outside Boston turns into a desperate evacuation as military personnel direct selected civilians toward Vault 111. The same date anchors the series from the original Fallout onward, where 23 October 2077 becomes the fixed historical break between the vanished modern age and the harsh, improvised societies that follow.
The war itself is remembered less as a long campaign than as a brief, overwhelming exchange that destroys civilization in hours. Cities burn, communications fail, and organized national authority ceases to function across much of the world. Fallout repeatedly treats this as the single most important event in recorded history after the Resource Wars. The famous opening narration of the first game places nuclear fire at the center of the transformation, while later games show what that means on the ground: sealed vault doors, abandoned highways, military checkpoints frozen in place, and landscapes marked by blast damage and radiation. The Great War is not simply another battle. It is the event that ends the political order that created Vault Tec, the Enclave, the Brotherhood of Steel's precursor military world, and the consumer society whose ruins still shape daily life centuries later.
Public memory of the day survives through siren drills, vault records, military logs, terminal entries, and the material evidence left behind in every region. In Appalachia, the people of Vault 76 measure time from the anniversary of the war itself, opening on Reclamation Day exactly twenty five years later. In the Commonwealth, entire neighborhoods remain as if interrupted mid sentence, preserving the instant when ordinary routines stop forever. The Great War therefore serves as both a date and a method of reckoning. People speak of pre war and post war life because 23 October 2077 divides all history into a before and an after. Trade routes, local governments, and emerging republics all define themselves against the wreckage left by that morning.
The significance of the Great War reaches far beyond destruction. It creates the conditions for every major Fallout storyline without needing to spoil any later personal journey. Vault dwellers inherit sealed experiments and survival missions because the bombs fall on that date. Settlements form in stadiums, deserts, ruins, and old suburbs because conventional state power disappears on that date. Factions argue over technology, territory, clean water, and energy because the institutions that once controlled those things vanish on that date. In practical historical terms, 23 October 2077 is Year Zero for the wasteland. Every later census, campaign, republic, expedition, and reconstruction effort stands in relation to the same terrible morning when the world changes forever.
Key details
Date: 23 October 2077
Location: Global, including the United States
Source: Fallout franchise lore, including Fallout (1997), Fallout 4 (2015), and Fallout 76 (2018)
Significance: The Great War destroys the old world and becomes the defining starting point for all later Fallout history.
Related events
FAQ
Q: When does the Great War happen in Fallout?
The Great War happens on 23 October 2077. That is the fixed canon date for the nuclear exchange that ends the pre war era and begins the wasteland age.
Q: Is the Great War a local disaster or a world changing event?
It is a world changing event. Fallout treats it as a global nuclear exchange whose effects destroy major governments, devastate infrastructure, and redefine history for centuries afterward.