The new Overseer immediately set out to correct the perceived lapses in security. Many suspected foul play, but they had little choice but to accept Almodovar's leadership. He was succeeded at his post by Alphonse Almodovar, a firm believer in the need to maintain total isolation of the Vault (thanks to his parents, who were convinced that the Vault should have no contact with the dangers out there). The progressive overseer has disappeared on an excursion into the wasteland between 22. The latter eventually returned to the Vault. Lewis and Agnes Taylor, two other members, remained in Megaton to serve as contacts between the two settlements and to further survey the surrounding environments. Most of the team returned on February 10, 2241, logging their reports. The survey team, led by Anne Palmer, left the Vault in February and reconnoitered the ruins of Springvale and the Megaton settlement, bringing back giant ant samples to the Vault for analysis. In 2241, the new Overseer decided to send scouting parties to the outside and open the Vault. ДЄlthough the fiction was maintained by his descendants, there was a deviation. However, for all other intents and purposes, the vault dwellers were sealed in with the motto 'we are born in the vault, we live in the vault, and we die in the vault'. The second Vault 101 Overseer was actually able to communicate with, and even visit, the outside world by using the secret tunnel in the Overseer's office.

He maintained and developed the isolationist doctrine, convincing senior vault dwellers to become complicit in the vault experiment. The second Vault 101 Overseer took over the reins after the death of his predecessor of natural causes in 2127. The first Vault 101 Overseer, like his counterparts in the other Vaults, was actually a planted Vault-Tec operative whose job it was to control the experiment from the inside.ДЄside from maintaining the fiction that the outside world was not habitable ruse after the Vault was populated and sealed when the Great War took place, the Overseer was meant to cultivate the isolationism, preventing anyone from leaving the shelter and using the faked radio transmissions to convince them of the folly of doing so. To this end, Vault 101 was supplied with all the equipment it would need to keep functioning indefinitely like spare parts for the water processor, but the vault didn't receive a GECK, a piece of technology that can only be used on the surface. The radio transmissions were actually recorded before the bombs even fell, and in many cases described a world even more horrible than the reality of the nuclear wasteland. While the Overseer was able to interact and visit the outside world via radio transmissions and a secret tunnel from his sealed office, the rest of the inhabitants were told that Vault 101 was never sent an вЂњall clearвЂќ signal, while faked radio transmissions described a nuclear-ravaged world gone mad, with absolutely no hope of existence outside of a Vault. The purpose of Vault 101 in the Vault experiment was to test the role of the Overseer in a community that remains indefinitely isolated from the outside world.

It's not exactly known when the construction of Vault 101 began but it was probably constructed in the 2060s like the other vaults in Washington, D.C.

Re enter vault 101