Battle for the Eclipse

The Second Battle of Kuat was a battle between the Zann Consortium, the Rebel Alliance and the Galactic Empire.

Buildup
Tyber Zann arrived with a fleet in the Kuat system intent on taking advantage of the chaos following the Battle of Endor and the steady disintegration of the Galactic Empire, by boarding the Eclipse-class prototype and accessing secret information stored in its vaults.

His fleet encountered a Rebel fleet wanting to raid the system and agreed on a temporary truce with the Alliance. This truce did not last long as the Rebels were also out to destroy Eclipse.

The battle
Being confronted with both a Rebel fleet and the local Imperial defense fleet, the Consortium pushed onwards, all the while performing an infiltration and takeover of the half-complete Eclipse.

Utilizing the semi-stable superlaser cannon of the Eclipse, Zann's forces gained the upper hand, though with the breakdown of the superlaser-system after a few shots, they would lose many vessels keeping enemy ships at bay.

The Consortium won, but at the cost of many lives on all three sides. A notable loss for the Empire was Admiral Gaarn, who commanded the Star Dreadnought Annihilator.

Aftermath
Having found information in the Eclipse's databanks, Zann decided to abandon the vessel, as it was too big a target for the Galactic Empire and Rebel Alliance to ignore.

Behind the scenes
Several players witnessed the destruction of the Millennium Falcon in this battle, though this contradicts canon since the ship appears in many EU stories taking place in post-Galactic Civil War eras. Some apparently see it jump away into hyperspace, which would explain this contradiction. 

Appearances

 * Star Wars: Empire at War: Forces of Corruption