Buenos Aires City retains the local outer-world commercial trade centers established by Marik entrepreneurs. The planetary garrison, a permanent Sian Commonality reserve regiment augmented by numerous local militia forces, signals Capellan determination to hold onto the planet.
Recently, a large island in the eastern basin has been taken over for secret tests thought to involve the development of rotary anti-'Mech VTOLS.
From 2901 through 2910, elements of an elite strike force (code named "Red Rover") containing units of the Defenders of Andurien and the Orloff Grenadiers, conducted a series of deep penetration raids against key Liao supply depots at Aldebarran, Shensi and Nanking. The raid culminated in the daring capture of a fully laded iceship, the "Silver Frost," as it prepared to depart the Buenos Aires system. With the Silver Frost in tow, the Red Rovers launched a multi-pronged assault on the then Liao desert world of Zion, routing the defending garrison from its fortifications in the Gapston mountain range.
 In addition to the Defenders of Andurien and her mercenary forces, Dame Humphreys also inherited several specialized FWLM units when Andurien seceded from the League – and began its joint invasion of the Capellan Confederation with the Magistracy of Canopus. Among these was one of the irregular “Liberation Units” whose personnel she unleashed on Shiba and Buenos Aires. Combining psychological warfare tactics with assassinations and sabotage, this small force quickly undermined the governments on both worlds and, having convinced the authorities that Sian had abandoned them, brought about their incorporation into Andurien.
 Leo’s Demons and Barton’s Regiment assaulted Buenos Aries in June 3034. Unlike their sister regiment on Shiba, the Fifth Defenders of Andurien made little effort to escape and in fact seemed eager to face the McCarron’s force despite the long odds. The six-week battle that followed left the Fifth badly bloodied but seemed to restore their sense of pride after the disaster on Betelgeuse. When they finally broke contact and left Buenos Aires in mid-July, the mercenaries chose not to pursue.
- System Name: Buenos Aires
- Coordinates: 18.26, -345.04
- Star Type: G8V
- Position in System: 3
- Time to Jump Point: 6.00 days
- Recharging Station: Nadir
- ComStar Facility Class: B
- Population: 2,168,000,000
- Percentage and Level of Native Life: 25% Reptile
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