Rather than shame his warriors by disciplining them for attacking Atreus's capital without orders, Khan Ian Moon publicly commended their actions and ordered the rebellious merchants punished for daring to lift a hand against MechWarriors. On the Khan's orders, the Cavaliers executed the city's merchants and their families, then razed every building in the city save for the spaceport. To prevent any recurrence of such "unnatural" rebellions against authority, Khan Moon formally stripped the Clan's lower castes of their limited right to self-governance and gave all political power into the hands of the warrior caste.
 In an attempt to stop Jaguar aggression elsewhere in their holdings, Clan Star Adder brought the fight to the Jaguars on Atreus in 3027. While the bulk of Alpha Galaxy held off the Jaguars Pi Galaxy, Sigma Galaxy's 428th and 471st Star Adder Sentinels secured and held Aerospace Plant CM-T72673. Hundreds of new Jagatai and Khirgiz fighters flowed into the Adders' ranks until Jaguar Khan Leo Showers finally took the factory back in 3040.
 After the Clan Smoke Jaguar's destruction, Clan Fire Mandrill and Ice Hellion absorbed the former Jaguar holdings on Atreus. The Mandrills currently control two-thirds of the world, and the Hellions the rest.
- System Name: Atreus
- Coordinates: 71.00, 1732.00
- Star Type: G5VI
- Position in System: 3
- Population: 8,100,000
- Percentage and Level of Native Life: Amphibians
System Owner Eras:
System Occupation Dates: