OMARA / OMARANS

An aggressive humanoid species which developed an expansive space faring civilisation, "The Omara are a nomadic species from beyond the Rim worlds. Theives and killers who have raided dozens of planets..." Their forces were wiped out in the 21st century by a batalion of the League of Planets jsut prior to an attempted invasion of planet Altor in the Epsilon Eridani system.
Source: Space Precinct, Seek and Destroy