When you create a new character in Fallout 76, you will be dropped into Vault 76 twenty-five years after the Great War. On the surface, the vault residents are leaving during Reclamation Day to repopulate the Earth after leaving. However, before you go, your Overseer contacts you and asks that you speak with the Responders regarding the nuclear weapons contained in Site Charlie, Site Bravo, and Site Alpha, still functioning nuclear missile silos.