The 28th Momento Legion or just 28th Legion was an elite legion of the Helghast Empire. The 28th Legion was established in 2357, a day before the Second Extrasolar War. According to Dikak Nerok, the first commander of the 28th Legion, Momento means "tactic" in some language that he forgot. In 2415 most were wiped out by the 1st Urban Defense Regiment. Those who survive were transferred to other legions.