Dusk of Justice (One Piece)

The world has been turned upside down. Blackbeard's Alliance with the remnants of The Beast Pirates and Big Mom Pirates, with well plotted and meticulous infiltrations in the world government led to the War of Exploitation. Blackbeard took down the world government and the Marines and as a result allowed the Chaotic freedom of piracy to run wild throughout the four seas that surround the Grand Line. The powerful ranks of the World Government and the Marines resides in Impel Down and Blackbeard sits in Mariejois.
A young Marine Captain , Jaguar.D.Dan gets released from being stuck underwater as a result of a major battle and wakes up to a changed world. He decides to venture in this world , this time as the outlaw, searching for any left over Marines who had survived the Authority Cleansing and possible allies to unite and spark a revolution against the Downfall of justice. His adventures takes him to discoveries about himself and the dark side of the system he had worked and believed in throughout his whole life. The perception of reality of a Young Marine completely changes, and the entirety of the world changes with him.