This article refers to the planet Decuu, in the Decuu system.
Decuu was the capital planet of the Black Star Confederacy after 18 ABY, after the Battle of Fuller, which reduced Fuller to a lifeless rock, scoured of life, interesting only to archaeologists and historians.
The planet of Decuu held the immense Decuu Arms facilities, where weapons and vehicles en masse were produced and tested out each year. It also held Fort Decuu, which trained the Armoured formations of the Confederated Army. After 18 ABY, it became the home of the Presidential Palace, the Senate and the new grounds of the famed Black Star Military Academy, which trained the finest officers.
Decuu was the homeplanet of the Decuri, and was heavily industrialized. It had a population of 11.750.000.000, most of which were Decuri, and worked in the weapons industry in one form or another.
The planet had standard gravity, and average temperature was around 20 degrees Celsius. A Decuu day lasted about 24 hours, while a Decuu year lasted about 360 standard days.
Decuu was ruled by Planetary Governor Arun Chi'il, the Decuri owner of Decuu Arms, until 18 ABY. After ABY, the planet was ruled directly from the Senate and the Presidential Palace.
Decuu was attacked several times during the 200 year long War of Lost Souls - a struggle between the Decuu Empire and the Fuller Republic, which cost billions of lifes on each side with no real gains, but the attacks were all repelled.
When the Black Star Confederacy was declared at the end of the 30 year long Unification War - essentially a civil war between Loyalist Fuller and Decuu forces on one side, and Rebel Decuu forces on the other - Decuu lost its status as a Capital World in favor of the planet Fuller.
Over the next thousand years, it was heavily expanded. Industry flourished, and as mining tools got better, the world was slowly stripped of its natural resources. The last few places still holding natural resources were declared Sanctuaries in 296 BBY, and mining operations moved to other worlds.
It became the capital world of the Confederacy in 18 ABY, after Fuller was scoured of life.
Decuu was an almost sacred place to the Confederacy, home to over 11 billion people.