I've Already Become the Four Emperors, but the Navy Is Still Begging Me to Become a Marshal.

Victor traveled through the world of pirates, and because he possessed the Titan System, he quickly helped the navy create an invincible legion of Titans. After several years of conquest, the giant army became powerful and invincible all over the world, and Victor also became a naval admiral. Later, because the top brass of the Navy coveted the dominance of the Giant Legion, the two sides clashed, and Victor sadly left the Navy. Soon after, without Victor's control and restraint, the giant army went berserk. Countless sailors died tragically as a result. The top brass of the navy came to apologize and invited Victor to return to the navy. "Mr. Victor, the Sengoku Marshal has resigned, and Akainu, who was rude to you, has been demoted to lieutenant general." "Please go back and take charge of the navy and become the next marshal!" Victor looked at the pirate flag fluttering in the wind. I have become the Yonko, with a reward of 5 billion beli, and you are telling me to become a marshal? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.