1138 was a Battle Droid henchman in OOM-9's droid force in Star Wars Episode I: The Phantom Menace.
After OOM-9's forces captured Theed, the Queen of Naboo left the planet with Jedi Knights Qui-Gon Jinn and Obi-Wan Kenobi. Naboo and its variant politicians were captured by Nute Gunray and the Trade Federation.
Amidala joined with the Gungans to take back Naboo from the Trade Federation. The Gungans fought the battle droids in the grassy plains. Just as the droids came close to the Gungans, 1138 hold his gun at Jar-Jar. The battle droids including OOM-9 and 1138 were deactivated when Anakin Skywalker destroyed the command ship. Jar-Jar Binks lugged 1138 to the ground.
1138's ID number is a reference to George Lucas' debut movie THX 1138.