Fantasy: the Age of Discovery (Part 1)

In the last life, the protagonist traveled to the world of One Piece and became the young Sengoku. After going through all kinds of hardships, he became the marshal of the navy. He planned the war on the top and left his lifelong old rival at the navy headquarters. Later, because of his dealings with Marshall D. Teach, the blackbeard who had become the four emperors, the entire army was annihilated. Later, I traveled to the fantasy world, obtained the system, and saw how the Warring States Period created the era of great pirates step by step. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.