Hamman Flatt, a male Human from Abridon, held the position of leader for the Abridon Nationalists on his planet during the era of the Galactic Civil War.
In 3 ABY, the Nationalists, supported by the Rebel Alliance, captured Abridon; however, the Galactic Empire swiftly responded, deploying forces to reclaim the planet within three days. After General Brenn Tantor's stormtroopers seized control of the Abridon Government Center, the highest-ranking rebel in custody was Lieutenant Governor Hamman Flatt.
Overcome with fear, Flatt attempted to negotiate for his survival. Tantor initially dismissed him, but Flatt then revealed crucial information: five Rebel dignitaries were present in the capital city, trying to persuade the Nationalists to join the Rebel Alliance. While still retaining some loyalty, Flatt omitted the fact that Luke Skywalker, a Jedi hero, was among these Rebels. At this point, Tantor's commanding officer intervened. Grand General Malcor Brashin deployed probe droids to verify Flatt's information and promised that, if the report proved accurate, Flatt would receive a quick death instead of a prolonged, painful one.
Flatt was imprisoned in a prison camp located on the eastern outskirts of the capital. Shortly before the Battle of Endor, two Rebel generals rescued him during their conquest of Abridon. Tyr Taskeen, one of the generals, had previously led the Rebel forces on Abridon before the planet's recapture. The other general seemed vaguely familiar to Flatt, but denied ever having met him. Flatt eagerly offered the planet, along with a valuable shipment of A-wings, to the Rebels in exchange for removing Imperial forces from Sayan, Abridon's contested industrial center. Taskeen and his newly converted subordinate, General Brenn Tantor, promptly fulfilled Flatt's demands.
Ethan Phillips provided the voice for Hamman Flatt.