The Chosen One (aided by Marcus and others recruited to his cause) destroyed the oil rig by overloading its primary reactor and causing a megaton-sized thermonuclear explosion. In 2242, the Chosen One traveled there via an oil tanker to save his tribe and the previous inhabitants of Vault 13, as well as to stop the Enclave and President Richardson from releasing FEV Curling-13 into the world's jet streams, killing all humans outside the Enclave worldwide, in preparation for Enclave's colonization.
In late 2077, not long before the Great War, the oil rig received schematics for X-01 power armor and Vertibirds from the Whitespring Congressional Bunker. As the world burned and United States disintegrated, its president and the Enclave, remnants of the pre-War American shadow government, established themselves as to its continuation, claiming authority over the United States mainland. Some members of the Enclave retreated to remote locations in other parts of the world, but when the bombs hit, they lost all contact with the main group. The Poseidon Oil rig in the Pacific was chosen as a secret base from which the USA could continue to exist and wage war on China, with the eventual goal of retaking the continental United States. During the nuclear storm of the Great War, the Enclave's most important members and essential personnel were evacuated to this location.īy March 2077, with the world heading directly for nuclear confrontation, the President of the United States and other members of the Enclave retreated to various fortified areas around the globe. The oil deposit was originally thought to be unreachable, due to it being located thousands of feet below the seabed. The United States won the international race to establish a platform at the location in January 2073, after which the Chinese accused the US of sabotage.
The oil rig was a pre- War deep sea drilling platform, built over the world's last accessible underwater oil deposit in the Pacific Ocean, 175 miles off the coast of California. 2.3 Industrial and scientific facilities.