Ground Battle on Bespin

"Load the tibanna gas"

- Tyber Zann

Prologue
Prince Xizor wanted to Tyber Zann to seize tibanna gas on Bespin and allowing him to keep 50% of the profit. Sensing the trap Tyber Zann formulated a plan to get rid of Xizor while keeping the tibanna gas for himself.

Landing
When Tyber Zann landed on a Besping platform he was questioned by 2 stormtroopers who he killed after a brief discussion. Then Consortium troops and Vehicles along with IG-88 landed on the captured landing zone.

Stealing the Tibanna Gas
Consortium troops quickly kill the stormtrooper sentries on guard. MZ-8 Mobile Pulse Cannon and MAls destroys the AT-ST while arriving droid tankers steal the tibanna gas. Meanwhile Tyber Zann plants evidence that the raid was conducted by no other then Prince Xizor. Also IG-88 hacks into the Imperial database.

http://images.wikia.com/starwars/images/b/b9/Gascollectiondroid.JPG

Darth Vader
Shortly after the successful completion of the mission Darth Vader and some Dark Side Adepts landed on the Besping platform. Knowing his forces was no match for Vader and that he needed them to find the evidence that frames Xizor, Tyber Zann and his forces quickly retreat to the landing zone for pickup. Some troops fought their way through Dark Side Adepts killing several while suffering some casulties. Some unlucky troops were killed by Darth Vader during the retreat. It is unkown what happened to the vehicles that failed to make it to the landing zone. Presumably they were either destroyed, sold for scrap, or put to use in the Imperial armed forces.

Epilogue
Darth Vader killed the field commander for not stopping the theft of the tibanna gas. From the evidence planeted on the Bespin platform Vader was convinced that it was Prince Xizor that commited the crime and killed him. Tyber Zann made huge amount of credits from selling the tibanna gas on the black market.

Source

 * Star Wars: Empire at War: Forces of Corruption