The Solaris Union, the first galaxy regime in human history, was destroyed due to corruption and tyranny during the Great Rebellion. After its fall, the galaxy was divided among three great powers. Unable to defeat each other, eventually, they agreed to a ceasefire and established the Interstellar Consortium to manage thousands of independent planets. Unfortunately, the Interstellar Consortium soon became a tool for the three powers to control and exploit the galaxy. Interstellar navigation was restricted, and planets were subjected to economic exploitation. In the 26th year of the Consortium Calendar, a revolution broke out on the planet Massilia in the Centersea Sector. The Consortium quickly decided to send fleets from the three powers to suppress the revolutionary planets. However, the Consortium Army was weakened due to the defection of the Black Flag, and the front line became a deadlock. The great powers had to allow the Consortium Army to recruit mercenaries to supplement their forces in the war zone. The Revolutionary Army and the Black Flag also began recruiting mercenaries. Militia, pirates, nobles, and technicians from all over the galaxy rushed to Centersea to join the war. Mercenary groups quickly became a main force in the Centersea warfare. Under the temptation of wealth and honor, beneath the banner of revolution and freedom, and stirred by hegemony and conspiracy, the Galaxy was falling into a chaotic era...