The Heir'tza is one of the two factions of Heiren that reside on the planet Heir'tzan in the Beta Bora system. For centuries the Heir'tza fought with the other main faction on the planet, the Heir'och. Things came to a head in the 21st century, when the Heir'och fled to a neighboring planet in the star system, which they named Heir'ocha. Despite a period of relative peace between the two factions, interstellar war soon broke out and persisted on and off for nearly a century.