The Hero Is in the Alien Warring Country, I Just Want to Return to the Earth

I came from the Earth and joined a secret and great organization. An accident occurred during an interstellar expedition. I fell alone on a planet with an environment very similar to the Earth. The technological level on this planet was very backward and it was in the turbulent Warring States Period. I only had a small amount of modern equipment and could barely adapt to survive. However, my expectations did not stop there. I must put an end to this troubled world. Only in this way can I maximize manpower and material resources, build a new channel, and return to my home planet, the Earth. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.