By this time, humanity had long abandoned fission-level nuclear weapons... Wait a second, Malin saw a new message, according to previous news reports, the nuclear weapons launched in the Central Siberia region were old models, originally intended to destroy meteors approaching Earth, so when weapons causing lighter pollution were used in other regions, Switzerland and the southern part of Italy as the hard-hit areas could only be struck with these heavy pollution weapons.
No wonder the Engma Empire was established before Sydney Union, the northern France and England regions were preserved well, while the entire southern part of Western Europe was bombed into a disaster, even before the fourth massive destruction these areas were still known as the Dark Zone.
Sydney Union could be established back then because this area was completely uninhabited, batches of Pioneer Knights joined one after another, embarking on another journey to revitalize human civilization.