Ur-Han Empire

The Ur-Han Empire was a major galactic power for most of galactic history and the preceding entity of the current Ur-Han Kingdom. It was proclaimed in -352 BC by Emperor Destir-Rum I. Until the 20th century, the Empire existed solely on the Ur homeworld of Ur-Sumtka, after which it quicklky expanded. At its peak, it encompassed eight billion star systems, two hundred worlds and a population of over fifty billion. For much of its history it was a galactic superpower along with the Surben Republic and Mirdesh Confederacy, and for a period is considered to have been the galaxy's sole hyperpower to date.
In 2612, the declining Empire entered into a period of internal conflict over matters of succession and secessionists. The government's enemies were openly supported by the Surben Republic which ended up declaring war on the Empire. Despite its weakened position, it was able to maintain itself and even secure a comfortable position. However, in 2637 the Terran Federal Republic entered the war with the aim of destroying the Empire. Within a few months, the Terrans had shattered imperial defences and morale, which was exploited by the Surben and the rebels. In late 2639, a new government was proclaimed, the Ur-Han Kingdom, which whilst nominally independent remained under strict Surben supervision. The lands of the Empire was split between the Kingdom, the Surben Republic itself, and the two newly-created states of the Tesrat Republic and Dermkha State.
The Empire was for most of its history a multi-ethnic one. It is however named after its principal species, the Ur. Ur meaning "the people", it was commonly used to refer to all the citizens of the Empire and today Kingdom. However, it is generally accepted that it is better to reserve this term to refer specifically to members of the Ur species, whilst nationals are called Ur-Han, "[of] the people's nation".