In a science fiction novel, the earth was invaded by aliens, and humans drifted in the universe, fighting with various civilizations and defeating different civilizations.

This was a typical sci-fi novel. The plot was as follows: A few years after Earth was invaded by aliens, humans were forced to drift in the universe to find a new home. In this process, humans had contact and wars with other civilizations, including alien civilizations, creatures on other planets, and different races in the universe. Humans need to constantly adapt to new environments and lifestyle, and at the same time, they need to constantly learn and evolve in order to better cope with various challenges and threats. In war, humans need to constantly fight and defend against attacks from other civilizations. At the same time, they need to explore new weapons and technologies in order to defeat the enemy and protect their homeland. Eventually, human beings successfully found a new home and established a prosperous civilization. However, in this process, human beings experienced many difficulties and challenges, and they needed constant efforts and struggles to succeed.