Ittummi was an advanced city on the Wookiee homeworld of Kashyyyk. It was completely surrounded by the forest. The city included a Fortress and a Command center, and featured prefab shelters and military buildings such as a troop center. A food processing center sat in a small outlet to the south of the city.
Shortly after the Battle of Endor, the city was led by an and had a large force of Berserkers.
During the battle to liberate Kashyyyk from the Galactic Empire, Ittummi was visited by the New Republic members Han Solo and Chewbacca, the latter of whom was a Wookiee. Chewbacca negotiated with the Elder, who agreed to turn over control of the Berserkers to Chewbacca's army. The Berserkers assisted in the destruction of the Empire's Moff Darcc's Palace.
Ittummi was first mentioned in the strategy guide for the 2001 video game Star Wars: Galactic Battlegrounds. The city appeared during a Chewbacca campaign mission, and visiting it to gain control of the Berserkers is a bonus objective. The mission and thus Ittummi appears in the game's 2002 expansion pack, Star Wars: Galactic Battlegrounds: Clone Campaigns.