Known more as the Hi'shen War, the K'sten Civil War was the result of tensions between the Neshaten Nation and three Daur factions. When the Neshaten began to settle outside of their world, the Neshaten Nation; which had grown to encompass the entirety of the Hi'shen planet didn't want to lose control of planets in their home system so they elected to take on a stern approach to governing those systems. This approach didn't sit well with the three factions that made their homes in space, the Lasce Faction - which was made up almost entirely of Daur. The Civaze Faction, which was a combination of Daur and My'leke, and the Nicase Faction which was Daur and Laibe.

The first sparks of the war began when the Lasce faction exploded a fusion bomb in the K'sten Orbital Station of the planet of Hi'shen, the station served primarily as an education institute for young and older children and is the reason why the war was named after it. The station's destruction resulted in another incident known as the K'sten Orbital Drop, where the stations fell back to the planet and crashed down upon a large city.

Because of this unprovoked attack, or rather, the Neshaten Nation's leadership deemed as one - they mobilized their warships and began to hunt down those responsible. It took only a few seasons for military intelligence to isolate the terror cells that caused the attack and allowed the military to assault those positions, but the war took another turn when the Lasce, Civaze and Nicase Factions united under one banner and began to launch attacks against the planet of Hi'shen, these attacks forced the Neshaten Nation to focus primarily on planetary defense and not focus outward.

It would take over a hundred years, and thousands of lives lost, before they could push the united factions away from their world. Executing organized strikes within the three factions, they were able to break the blockade and finally able to get their ships back into orbit where they could be of better use. This became the turning point in the civil war, with the Lasce faction being wiped in 335 followed by the Civaze faction in 337. In the year of 341 the Neshaten Nation fought the Nicase Faction over their homeworld of Ni'euase, but the Neshaten found themselves unable to break the willpower of these fighters and soon found themselves being slowly driven back.

In order not to lose their momentum, a controversial decision was made in the upper echelons of the Neshaten Nations military to deploy anti-matter bombs on Ni'euase, much to the protests of military commanders. These weapons were deployed through the use of special operations teams and detonated across the planet, resulting not only the ending of the war but the deaths of countless billions of Ni'eauses.