Atlas, formerly known as Mantle, is a kingdom located in Solitas, the far northern continent of Remnant. Unlike most kingdoms, Atlas' government, military, and the Academy function as a single entity. It is also the location of the Schnee Dust Company headquarters, the largest supplier of Dust in the world.

The kingdom is known for its innovation and far-reaching technological achievements, having developed, and then gifted the Cross Continental Transmit System to the rest of the world after the Great War, allowing for communication between the four kingdoms. Atlas is also a primary producer of Dust, and the Schnee Dust Company's main headquarters is located in the kingdom. Other technological advances spearheaded by the kingdom of Atlas include great strides in the field of robotics. Robots built for combat include the Atlesian Knight-130, supplied by Atlas to the rest of Remnant.

Around 100 years ago, a massive ten-year conflict known as the Great War came to an end. In this war, Mantle and Mistral fought Vale and Vacuo. Prior to the war, Mantle formed an alliance with Mistral. The two traded frequently, and Mantle taught Mistral how to form settlements in the snowy northern region of Anima. During the war, Mantle accelerated the pace of its technological innovation, developing new weapons and applications of Dust, giving them an edge during the conflict. Large tracts of land were set aside for Dust mining and research. The Kingdom was also home to at least one combat school, Alsius, located to the northeast of the main settlement. The territory surrounding Alsius was used as a research and development facility during the war. The Great War finally came to an end with the deadliest battle in the war's history. Mantle and Mistral attempted to take Vacuo's Dust mines to cut off their enemy's supply. There, they were met with the king of Vale personally leading his army alongside Vacuo. It is said that he laid waste to countless men, but historians claim that this feat was aided by the unusually violent weather and Mantle's inexperience in desert combat.

With the war over, the leaders of the four kingdoms gathered on neutral ground on Vytal to form a treaty and plan the future of Remnant. There, the four kingdoms' governments were restructured, their territories were redistributed, slavery was abolished, the tradition of the Vytal Festival was begun and the king of Vale founded the four Huntsman Academies. Alsius was reopened under the name Atlas Academy and was secretly given a Relic to safeguard. As a gift to the world, Atlas invented the Cross Continental Transmit System and had the towers for it built on each Huntsman Academy's campus, thus allowing all four kingdoms to communicate. In an attempt to give back to its citizens, Mantle applied many of the techniques and technologies used in the war to enhance the Huntsman Academy's campus, expanding the school grounds and even securing the surrounding areas. Along with the eventual establishment and merging of the military and research facilities with the government and schools, the original capital of Mantle was overshadowed. The decision was made to move the capital to Atlas, and the Kingdom as a whole was also accordingly renamed to Atlas.