Destruction of Control Station ENCLAVE The destruction of Control Station ENCLAVE was the nuclear devastation of the Enclave ' s oil rig on the Pacific Ocean in the year 2242 . Prelude . The Chosen One boarded the PMV Valdez after recovering fuel sources to power the tanker , and rode the ship across the Pacific and docked in the oil rig . After the Enclave invaded Arroyo and Vault 13 , the inhabitants of the two locations were imprisoned on the oil rig . Destruction . After sneaking through the entrance sector of the rig , the Chosen One spoke to members of his tribe in their cells . His mother informed him that it was possible to overload the facility ' s nuclear reactor , causing a meltdown . The Chosen One went through the presidential offices , and could have confronted President Dick Richardson . After reaching the rig ' s reactor , the Chosen One would have found a way to destroy or shut down the reactor ( shutting down the reactor too quickly will cause a meltdown ) . Afterwards , the Chosen One went for the rig ' s entrance to leave before the rig exploded . However , he was faced by Frank Horrigan and the Enclave Control Company , led by Granite . The Chosen One convinced Granite and his team to abandon the Secret Service and join him , and fight by his side against Horrigan . After defeating Horrigan , the Chosen One and the ECC escaped the oil rig in time . Upon their departure , the rig was obliterated by the reactor , releasing a ginormous megaton - sized mushroom cloud . Aftermath . The Enclave ' s plan to poison the Earth ' s jetstreams with a customized variant of the Forced Evolutionary Virus , codenamed Curling - 13 , and killing off the ' mutants ' , was abolished . As a result , the Enclave would suffer substantial setbacks to its agenda and significant reductions to its manpower with the destruction of their oil rig headquarters , and was thrown into temporary disarray due to the sudden lack of a hierarchical leadership . All Enclave personnel that managed to flee the rig during the Chosen One ' s infiltration in VB - 02 Vertibirds would ultimately fall back to various locales throughout the United States . The known main force that was still stationed at Camp Navarro eventually headed for the Capital Wasteland and / or Chicago under the command of Autumn Senior , by order of one of President Richardson ' s political advisers : the newly self - proclaimed President , John Henry Eden . In time to come , some of the Enclave remnants attempted to integrate themselves peacefully into the NCR , concealing their checkered pasts . This met with varying degrees of success , but it appears that a fair number managed to live out their lives in relative obscurity , including the parents of Arcade Gannon . The full story behind the destruction of the oil rig , however , seems to have been lost , and the Chosen One has evidently never bothered to give a personal account to any NCR historian or Brotherhood archivist for record - keeping purposes . As a result , this chapter of history is not common knowledge in the NCR , and the remnants of the Enclave are themselves unclear about the exact details of their day of defeat . Former officer Judah Kreger attributes the oil rig ' s destruction to " internal sabotage " of some sort , in conversation with the Courier . Appearances . The destruction of Control Station ENCLAVE appears only in " Fallout 2 " , and is mentioned in " " and the " Fallout Bible " . It is also referenced in " Fallout 4 " .