The Subjugation of Geonosis was an early battle in the Galactic Civil War.
With the Death Star project running out of construction slaves, Grand Moff Tarkin ordered Darth Vader to go to Geonosis and round up the natives to use as slave labor.
Unfortunately for Vader, the Geonosians had secretly aligned themselves with the growing Rebel Alliance and the Geonosians already used as slaves revolted against their Imperial masters.
A Rebel fleet orbited the planet to prevent the system from being conquered by the Empire. As the Imperial Navy entered the system, the resistance force ambushed the attackers. Concentrated fire from assault ships eventually brought down the Rebel space station. The survivors were routed out and destroyed by TIE squadrons.
AT-STs fighting Rebels and Geonosians.
The Imperial Army landed on the planet, put down the slave revolt, by destroying some of the hives that the Geonosians resided in, and scattered the remaining rebel resistance. The Rebellion had established a base on Geonosis to support the Geonosians. Vader's troops defeated the Rebel units stationed on Geonosis as well and destroyed the Rebel base.
As result of the battle, the Empire then gained a valuable source of slaves to assist in the construction of the first Death Star.
This battle was the fourth mission of the Imperial campaign in the 2006 video game Star Wars: Empire at War.
The composition of the Imperial force and its casualties vary, depending on the player's actions. However, the presence of Darth Vader (who pilots the TIE Advanced) and Black Squadron is mandatory in the space battle.