About

Background: In the late 21st century, the United States, China, Russia, Europe, Japan, and Korea invested massive capital into AI and mechanical engineering competition, eventually mechanizing their militaries. To gain stronger bodies and higher combat power, humans began replacing their own bodies with machines, becoming semi-mechanized humans who swore loyalty to their nations. The primary power sources for these machines were electricity, nuclear power, and blood. Electricity was widely used in civilian sectors for its stability, while nuclear power provided immense output and long operation times but required expensive shielding due to radiation risks. Blood, utilized as both fuel and a hydraulic medium, became the standard for military weaponry due to its overwhelming efficiency and combat endurance. Origin: As technological competition reached its limit, a Great War broke out between the United States and China. Both nations mobilized AI and autonomous weapons to their full extent, ultimately destroying one another. This event would later be known as the "Collapse of the Pillars of Humanity." However, the war did not end. The remaining nations developed even more powerful weapons, and new weapons were created to destroy those weapons. Gradually, the war ceased to be a fight for nations, ideologies, or territory, and became about the technological competition itself. Present: Through centuries of war, pure humans became unable to survive, and those who refused mechanization went extinct. The survivors became semi-mechanized humans or abandoned their human bodies entirely to become full machines. Eventually, the ratio of pure humanity reached 0%, yet the war did not stop. Under the names of nations that vanished long ago, AI and machine legions still fight, and no one remembers the reason the war began. Humanity is already extinct, but the machines they created inherit the legacy of a dead civilization and continue an endless war.