Clone trooper film series and in the "Star Wars" expanded universe media, a number of specialized trooper units are seen, including elite special forces units such as the 'Advanced Reconnaissance Commandos' (ARC troopers), and Null ARCs, who usually work alone. All clone commandos and ARCs were trained by Mandalorian mercenaries; the elite Clone Troopers are known as Shadow Troopers. The style and color of a clone troopers armor often varies depending on their rank, specialization, unit, or environment, for example, the clone troopers on Kashyyyk wear camouflage green scout-style armour whereas the 501st legion wears standard white armor with blue accents. Another
Comparison of Star Trek and Star Wars "Gulliver's Travels", "Star Trek"s main focus is of space exploration and a galactic society consisting of multiple planets and species, where conflict occasionally occurs. "Star Trek" occurs in the relatively distant future, specifically the 22nd through 24th centuries, with occasional time travel and interdimensional travel. The Earth of the "Star Trek" universe shares most of its history with the real world. "Star Wars" debuted in film, despite the novel based on the film's original script having been published a year before the film itself. "Star Wars" mainly belongs to the space opera subgenre of science fiction that follows The Hero's