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The original Vault 3 inhabitants opened their doors and began to trade with people outside of the Vault.
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All was going well in the Vault until a water leak occurred sometime in the 23rd century, forcing the residents to open the Vault to find help.
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Nestled within the South Vegas ruins, Vault 3 was one of the seventeen control Vaults, resulting in it not having an experiment. Vault 3 is one of four Vaults in the Mojave that contains living human inhabitants, the others being Vault 19, Vault 21, and Vault 34.
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