The Atreus system is the location of at least one habitable world, Atreus III, as well as a notable moon, Wendigo, and as at 3145 was located in the Free Worlds League. The Atreus system lies close to the Alterf and Ionus systems and consists of an F4V primary orbited by at least three planets, one of which is habitable. The Atreus system was colonized during the First Exodus from Terra.
Atreus III, more commonly referred to simply as Atreus, is the third planet in the Atreus system and for centuries served as the capital of the Free Worlds League. Atreus is home to a number of important defense industry facilities and is orbited by a moon named Wendigo, notable for being the location of the headquarters of SAFE, the League intelligence agency.
Atreus was colonized in 2160 as part of First Exodus from Terra. The planet was one of Terra's most distant colonies at the time. The world became capital world of the Free Worlds League in 2271. Atreus was conquered in 2246 by forces from the Republic of Marik; the forcible induction of Atreus into the Republic resulted in the Republic reinventing itself as the Marik Commonwealth, with Charles Marik as leader.
During the Reunification War, Atreus was one of several worlds within the Free Worlds League that prisoners captured during the war between the Star League and the Magistracy of Canopus where prisoners were interned. While troublesome prisoners were interned in prisons, the majority of the internment facilities resembled military barracks and with the Canopians lacking any of the paperwork or identification required for interstellar travel conditions were rather relaxed. While prisoner rosters were taken and checked, the Canopians were given access to sports, leisure and education facilities, as well as a small stipend. Many of the MAF officers actually found themselves being invited by the local military and nobility to soirees and events where the Canopians were the guest of honor. This was tacitly, or possibly actively, encouraged by Captain-General Marion Marik as both a demonstration to the Canopians of the benefits of life available under the Star League and as a reminder to First Lord Ian Cameron of the benefits of applying a carrot to the Periphery nations, rather than a stick. Many of the Canopian prisoners who returned to the Magistracy after the war became active and vocal supporters of integration with the Star League as a result of their humane treatment during the war.
On the 3rd of October 3068 the Knights of the Inner Sphere were the subject of a surprise recall order, bringing them back to Atreus from their assignment as a part of Marshall Jeremy Brett's Operation BROKEN FIST counteroffensive against the Skye and Bolan Provinces of the Lyran Alliance. The Knights arrived on Atreus on the 24th of October, and were the recipients of a hastily-arranged honor parade on the 25th when a Word of Blake Overlord Class DropShip and other aerospace elements attacked Atreus City during parade honoring the Knights of the Inner Sphere, using chemical weapons to killing the bulk of Parliament and the Knights. The escaping dropship was destroyed by pro-League forces. The Word of Blake forces' biochemical agents killed many of the Knights in the streets of Atreus City along with the bulk of the League parliament as well as a damaging the Parliament building of the League. As the attack commenced a Blakist propaganda stream was broadcast declaring that Captain-General Thomas Marik was a fraud; shortly after the attack, the local communications network was disrupted across a wide area, and a massive naval engagement erupted in the Atreus system as the pro-Word and pro-League elements of the Free Worlds League Navy began attacking each other.
Fighting on Atreus by pro-Blakist troops attempt to oust both the false Thomas Marik through, even after false Thomas Marik is removed in July 3069. Paul Marik, real-Thomas Marik's brother installed his daughter, Corinne Marik, as Captain-General of the League. During this period Word of Blake forces begun using Atreus as training base, with the 15th Division taking up garrisoning the planet in Paltos region.
In 3076, Thomas Halas (formerly the false Thomas Marik), launched a raid, attempting to rescue survivors of the 1st Knights of the Inner Sphere. His forces included the 2nd Knights of the Inner Sphere, and they saw action against the 15th Division and supported by Marik-Commonwealth forces of the 2nd Free Worlds Legionnaires and the 8th Free Worlds Legionnaires in a campaign that ran through Atreus City and into its southern suburbs. The battle ultimately left several million homeless and thousand dead. It left the city storied Interstellar Botanic Gardens and Technology Museum in aftermath of the conflict.
Marik Commonwealth forces consisting of the Second and Eighth Free Worlds Legionnaires turned on their Blakist "allies" in the wake of Alys Rousset-Marik and her Resistance forces arriving in orbit. The Legionnaires stormed the Blakist's Karpov Training Range in the Paltos Mountains where they clashed with the Fifteenth and Thirtieth Divisions in a battle of survival. Alys' forces in orbit clashed with the Division's Pocket WarShip forces. However, League forces storming the control failed to stop the Blakist from sending distress call from its HPG. This led to the orbiting Blakist forces using nuclear weaponry on land and orbital targets provide cover for its retreating allied units. Few Blakists escaped and the Resistance set up a detention facility at the Karpov training range.
Atreus was originally considered to be safe from the turmoil of the Jihad, but the various battles on the planet and the use of chemical weapons and the dispersal of the Free Worlds League Navy shocked the population, and the guerilla campaign waged by the Knights of the Inner Sphere inflicted further damage on the world. By 3079 reconstruction efforts were well under way. The various military and defense industry facilities on Atreus weathered the Jihad to varying degrees; of the aerospace industries, the DropShip manufacturer Deller, Bingham and Fouts had lost almost half their industrial production capacity to damage during the Jihad, but had restored output to three-quarters of pre-Jihad production by 3079. Conversely, the ImStar Aerospace ground facilities took damage during the Jihad, the orbital facilities were largely untouched; despite approximately a third of the lines being damaged, production was barely above half of pre-Jihad levels in 3079 due to ImStar closing down the production lines for the Agamemnon-Class Heavy Cruiser as parts to complete the WarShips were no longer arriving. The Imperator Automatic Weaponry plant sustained more damage than the ImStar facilities, although less than the Deller, Bingham and Fouts factories and production had been reached two-thirds of pre-war production by 3079. Enrollment at the Atreus Officer Training College was also down sharply as recruits from other provinces were no longer enrolling.
The last assembly of the Free Worlds League parliament was held on Atreus on the 28th of January 3079. The final vote of the parliament was on the subject of the dissolution of the League; of the 83 votes polled, 75 were in favor of disbanding the League. As a result, the confederation of member states was dissolved, and the Free Worlds League disbanded as a nation.
Atreus city was in ruins by 3138, the majority world population is malnutrition. The city itself had fallen into ruins through neglect. The Marik-Stewart Commonwealth claimed the world after the Jihad; however no move was made to restore the capital city. However its manufacturing facilities (Imstar Aerospace) were restored. The world was used briefly as the temporary capital of the Commonwealth at beginning of the Steiner Invasion of 3137, but it was moved yet again to Stewart. After the fall of Marik-Stewart Commonwealth, Regulan Fiefs' forces invaded the world in 22 July, 3138. They easily took control the world, with no resistance. Captain-General Cameron-Jones order the restoration of the old FWL's House of Parliament and to bring food to the people whom he witnessed the state of starvation they were suffering from. In April, 3139, the Regulans lost control of the planet to a coalition force of the new Free World League, led by Warden Thaddeus Marik in Operation Homecoming. Coalition leaders began restoring the capital, including helping restore health of the residents of planet. By July 3rd, the world became the capital of the new Free World League.