The Imperial Fists are one of the First Founding Chapters of the Space Marines and were originally the VII Legion of the Legiones Astartes raised by the Emperor Himself from across Terra during the Unification Wars.
The Imperial Fists stand out from other Space Marine Chapters since they possess no fixed homeworld, although they are most frequently based on Terra. Instead, the Imperial Fists rely on their 10,000-year-old mobile space fortress, Phalanx, to serve as their fortress-monastery