Archenemies weren't a rare thing in the Milky Way.
Civilizations always wanted to move up. Having a destined opponent could provide a good motivation for the people to move forward, whether it was in the economy, technology, or military.
The sense of superiority and self-confidence brought by surpassing archenemies was also an important means to improve the cohesiveness of the people.
Therefore, the civilizations in the Milky Way would more or less have one or two archenemies, even if they were just playing house and did not have any actual confrontation.
However, there were also some civilizations that were truly archenemies with each other.
Once their war broke out, there would probably be no other outcome other than the destruction of one side, just like now...
On the most important planet of the Watcher was the Temple of the Sky. Tens of billions of believers were gathered there, looking at the sky with solemn expressions.
