Defenders of Earth

As technology advanced, Earth experienced an explosive technological boom, making long-distance space travel possible. Then came the startling news: life existed beyond Earth.

Aliens sought to conquer Earth and enslave humanity. Lin Yu had been an ordinary Earthling, but he worked tirelessly to advance technology and defend the planet.

As Earth's military strength continued to grow, it eventually became one of the top powers in the universe, perhaps even the strongest of all.