Historians often start the planetary history of Jarilo-VI from the War of the Gods thousands of years ago. The war between the eleven Perun Sates and the Veles Union Army scorched the land for years until an early spring completely changed the fortunes of war, and the Veles had a total victory. They praised the spring war god Jarilo for helping them eliminate their arch enemy, and praised the land with poems of the same name. The current name of the planet in the cosmos's records — Jarilo-VI — may be a mistranslation that contains a poetry stanza number.
When the mythological war was over, Jarilo-VI welcomed a long period of peace and developed from a hunter-gatherer society to one conducting space explorations. Unfortunately, Jarilo-VI was a planet with few resources. Intensive development brought top-tier technological advances to Jarilo-VI, but also brought an end to their history. Exhausted resources, the arrival of a Stellaron, and the appearance of the Eternal Freeze… These various disasters completely annihilated Jarilo-VI's glorious but short-lived civilization.
The survivors of the Eternal Freeze managed to stay alive in a corner of the planet. They forgot the old name of Jarilo and created Belobog, a city made to shelter against the Eternal Freeze, and continued their civilization. Due to its isolated and dangerous environment, Jarilo-VI lost contact with other worlds after the appearance of the Cancer of All Worlds.