The protagonist's soul travels and becomes the lowest level "consumable material" ore star miner.
Mine star miners are the lowest-level mining slaves. In order to survive in the grand, cruel and dark science fiction world, they work hard and calculate to escape from the status of mining slaves and become the lowest-level citizens.
Then by chance, he was promoted to the Astra Militarum (that is, the big-headed soldier), but the Astra Militarum was still a victim of the war, and continued to live an ignoble existence in order to survive the cruel war.
Surviving an ignoble existence on the battlefield was mistaken by the commander for his outstanding performance and bravery in combat, giving the protagonist the opportunity to become an interstellar warrior. In this way, the protagonist got the opportunity to become an interstellar warrior through his military exploits.
After experiencing cruel and bloody battlefields, he knew that only the strong could survive. He actively studied and trained, and through learning and genetic modification surgery, he became a space warrior.
