The Tadrin sector represented one of the three Cassandran sectors established within the Outer Rim Territories by the Galactic Empire. Among the planets situated in the Tadrin sector were Minashee and Garqi. Moff Luthus Tadrin oversaw the sector; the sector's name originated from his family. The capital of the sector was Minashee.
In 25 ABY, the Yuuzhan Vong launched an invasion of the sector.