3 Days War

Background: In 2069, humanity discovered a high-energy density mineral, the Black Stone. Countries vied for control of this resource, leading to conflicts that culminated in a global war in 2085, known as the First Black Stone War. Five years after the war began, humanity developed the Core-Gear, a giant war machine powered by Black Stone. Its immense combat capabilities had an immediate impact on the war, and within a year, the world briefly returned to peace. The world split into three major f...