Abaros was a gas giant planet in the Mid Rim. It had a large ring system.
In 5 ABY, several Adrissian thugs in the employ of the New Republic in the planet's rings spotted the prototype Vektek-class stealth cruiser, Arconoss, one of the most powerful and most elusive in the Imperial Navy. They boarded the ship, which contained the remains of the feared warlord of Kalee, General Grievous, and captured the ship's crew, whom they summarily executed. After stripping the ship bare, though they did not find the remains of Grievous, they jettisoned the bodies and left the ship to drift in space forever before departing the system.