Although it was sealed by the renegade U.S. A month later, on June 23, they discovered the Mariposa Military Base. The party, accompanied by several other adventurers, set out from the Hub on May 22. To find the source of the mutant threat, Harold joined forces with Richard Grey (an exile from Vault City) and formed one of the first adventuring parties in the wasteland in order to find the source of the mutants. However, by 2102 these attacks intensified, causing significant losses in shipping. The wasteland seemed to be (relatively) peaceful for a time, with the occasional mutant attack on caravans. No one expected that these humble beginnings would eventually culminate in the formation of the New California Republic. While a large portion of the vault inhabitants that left the overcrowded Vault would band into raider tribes as the winter of 2098 came (marking the beginning of the Khans, Vipers and Jackals), the remaining vault dwellers would found Shady Sands in the Spring of 2098. Within ten years of the city's founding in 2093, caps became the standard currency of the wasteland. One of the landmark decisions that would shape the wastelands for decades was the Hub's adoption of bottle caps as currency. Although he exited the vault in 2090, by 2096 he was a caravan boss in the city. Its central location soon attracted plenty of traders, including Harold, from Vault 29. The founder and first mayor of the settlement, Angus, called it the Hub. Two years later, in 2093, the future mercantile superpower was established around a filthy oasis in the desert. The inhabitants founded Adytum in what became known as the Boneyard. A year later, the demonstration Vault in the ruins of LA opened. In 2091, after receiving the all-clear signal, Vault 8 opened and Vault City was founded. The founding of Necropolis started a decade of development. Less than a year later, in 2084, Set wrested control of the settlement from the original overseer. The Necropolis was founded in Summer 2083. The first group to emerge and found a new town are the ghoulified inhabitants of Vault 12 beneath Bakersfield. The radiation and mutations flooding the wasteland eventually calmed down enough for the survivors to start forming new groups.

Д«y 2080, the first mutations started to occur among the survivors and wildlife, creating new species practically overnight. Smaller towns were seeded as well, as is the case with Junktown, founded by a U.S.

Even then, the seeds of future wasteland powers were sown that day, as the Brotherhood of Steel formed out of the renegade Army units at the Mariposa Military Base. Vault 13 was sealed with particularly many dwellers, thanks to its delayed construction that reduced the cry wolf effect. The casualties caused by the nuclear weapons were severe, although many people managed to find safety in the underground Vaults constructed in the region, such as Vault 15 or Vault 8. Other vital installations include the Mariposa Military Base (newly constructed as of January 2077) and the Sierra Army Depot (in operation since 1942, refitted in 2050 as a top-secret research base, and then converted in 2077 into an automated defense base). One such example was the West Tek Research Facility, established in 2055 to research the New Plague. Before the War, many important facilities were located in the region.

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