Tezber was an outpost on the planet Acamar III. This outpost housed a weapons supply depot. The outpost was located in the Vackrinos District, and was in proximity to Felker City.
In 2313, Tezber was the site of a Gatherer raid led by Penthor-Mul. This raid led to the destruction of the depot. (TNG: "The Vengeance Factor")
This outpost was mentioned in the police records of Penthor-Mul, which were accessible to the crew of the USS Enterprise-D via the Acamarian planetary database.
For this raid, Penthor-Mul was charged with terrorism, inciting to riot, and engaging in a blood feud.