歷史學家大多將雅利洛-Ⅵ的星球歷史追溯到上千年前的神話戰爭，佩倫人十一國與維萊斯集團軍的戰爭焦灼而持久。直到一場早來的春天徹底改變了戰局，維萊斯人大獲全勝。他們將消滅夙敵的功勳歸於春日戰神雅利洛，並用同名的詩篇讚美大地。如今銀河記錄中的星球名稱——「雅利洛-Ⅵ」可能為包含詩歌章節的誤譯。
神話戰爭結束之後，雅利洛-Ⅵ迎來了長久穩定的和平，並完成了從刀耕火種到星際航行的發展。遺憾的是，雅利洛-Ⅵ是一顆資源相對貧瘠的星球。激烈的發展給雅利洛-Ⅵ帶來了頂尖的科技水平，同時也帶來了歷史的終結。資源枯竭、星核墜落以及寒潮降臨…眾多的災難徹底葬送了雅利洛-Ⅵ輝煌而短暫的文明歷史。
寒潮中倖存的難民屈居一隅，遺忘了「雅利洛」舊名，建造了寒潮避難所城市「貝洛伯格」延續文明的燈火。因其封閉危險的自然環境，雅利洛-Ⅵ在「萬界之癌」出現後與其他世界失去聯繫。
Jarilo-VI (Location)
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 States 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 natural environment, Jarilo-VI lost contact with other worlds after the appearance of the Cancer of All Worlds.
