military, like the Enclave and Brotherhood of Steel, as well as the Institute. Īfter the Great War, a select few suits were engineered further and employed by remnants of the U.S. Further development was made impossible due to the outbreak of the Great War. While the suit served as a successful proof of concept of using a strontium-90 based plating over the armor, this improvement was not adopted into the armor's schematics, before the onset of the Great War. A single suit of X-01 was provided to the Nuka-Cola Corporation, as part of Project Cobalt. While the first test models were issued to Presidential bodyguards, the X-01 was never deployed in larger numbers. However, although the suit was technically functional by late 2077, it was burdened with numerous issues that precluded widespread use in the field. It represented a radically new approach to designing powered armor, eschewing traditional design philosophies that defined the T series, and was a high-profile research project meant to supersede previous power armor models. Commissioned by the Joint Chiefs, the development of the X-01 began shortly before the Great War.
