It represented a radical, new approach to designing powered armor, eschewing traditional armor design philosophies, but was never deployed in larger quantities until the 23rd century.Īccording to the Fallout Bible, work on the model was restarted by the Enclave in 2198, although it was not until 2215 that the research efforts began in earnest under a presidential mandate, with the first production model created in 2220.
It served as the baseline for the post-War remnants of the United States military, who developed it into a power armor tailored for the wasteland. The development of the first suit of advanced power armor, designated X-01, began shortly before the Great War. 2.5 Advanced power armor Mark II (Tesla variant).2.3 Advanced power armor Mark I (Tesla variant).