The year is three thousand-fourty-seven, and humanity has once again entered a period of widespread conflict. Countries are thrown into turmoil due to endless skirmishes over resources and territorial control. Among the major powers, "Eagles and Stripes" focuses on global policing. In contrast, another significant power, "Stars and Skies," invades smaller nations to expand its territories and improve business to develop infrastructure. Finally, there is the "Ravenian Empire," a powerful and diplomatically connected empire that controls some of the world's most critical weapon systems and natural resources.
These three major powers maintain a balance in the world, and ordinary citizens generally adhere to established government rules. However, the frequent wars have drastically reduced the population and strength of each country. As a result, every nation and significant power has turned to the most advanced military technology available: human-controlled troops. These superior weapon drones, known as "Titania," possess the memories and combat capabilities of the deceased.