“The peoples of Saturn embraced Ollis Kha as their Emperor. Their faith was well place as Kha created an empire that would last seven centuries.” - Benjamin Pho, Rorse's History of the Outer Worlds Volume IV, 6211
The Kronian Empire was one of the Powers originating from Saturn and existing from 4288 to 4941.
In the late 43rd century the Outer Planets were under threat from the Roid War. Ollis Kha was elected as the the Grand Commander of a unified Saturn military force to defend the territory from Roids. Kha built a strong military and secured Saturn space in a series of decisive victories. With the support of the people, in 4288 he was named as the first Emperor of the Kronian Empire.
In the 47th century the Paragons ceased to exist as a political entity and the Kronian Empire took control of some areas of the Belt.
By the end of the 49th century tensions between the Empire and the other Powers in the Belt led to the Tethys War. The war ended in 4941, at which point the Empire was no longer a Power in the Belt. It contracted back to Saturn space in the late 50th century. In the 55th century the Ma-Khar Armada swept across the Outer Planets and brought the Kronian Empire to an end.