Imperial Marine Corps (Earth-2042)

The Imperial Marine Corps were a specialized branch of the Imperial Stormtrooper Corps in the Imperial Armed Forces. Primarily served on Imperial-class Star Destroyers as defense. They were trained to board enemy warships. They acted as "the punch" of the Imperial Navy like their predecessors, the Systems Alliance Marine Corps.

Source

 * https://starwars.fandom.com/wiki/Imperial_Marine