Harvath

"A desert twilight of glass and tech. That is the best way to describe the House of Baas"
-the adventurer Tzan'kai describing Harva in his work: Guidebook to The Planets of Mastaar
Harvath, also call the House of Baas and Harva is a desert ecumenopolis planet that is the capital world of the Harva Empire. It is described as a web of glass and neon that divides the sandy wastelands from which the planet's primary race, the harva, sprung from. 
Though home to over a 100 billion sapients, only around a 4-5 million of them are actually harva. The harva are a slaver race that have imported nearly all of its world's population from their conquests. The harva act as the top prong in a complex caste system with over 100 layers. 
The harvans are bitter rivals to the Aravaraians, and have tried to pressure Aravaraian officials during peace talks on Quainaar to renounce their claims to Earth in an attempt to weaken them for when the next intergalactic war breaks out. The harvans claim Earth because it was discovered by their adventurer Tzan'kai, and the Aravaraians claim it because it is the crash site of Fleet 13 and the home of queen Tulivai'n. The terrans themselves claim to be a part of a planet-state known as the "United Nations", and denounce all non-terran claims to their territory.