The original Vault 3 inhabitants opened their doors and began to trade with people outside of the Vault. All was going well in the Vault well until a water leak occurred sometime in the 23rd century, forcing the residents to open the Vault to find help. 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 the four Vaults in the Mojave that contain living human inhabitants, the others being Vault 19, Vault 21, and Vault 34.
