One Piece

~900–800 Years Ago 🔹 The Void Century A mysterious period erased from history. A powerful, unknown Ancient Kingdom existed and was defeated. The 20 Kingdoms allied to form the World Government. Joy Boy makes a promise to a mermaid princess (Fish-Man Island), which he fails to keep. The Poneglyphs are created by the Kozuki Clan to preserve history. 800 Years Ago 🔹 Formation of the World Government 20 kings establish global control. Capital is built at Mary Geoise atop the Red Line. The Celestial Dragons begin their reign. The Empty Throne is created to symbolize that no one king rules — secretly ruled by Imu. 400–100 Years Ago (estimated gaps) 🔹 Little is publicly known — history is tightly controlled. Cipher Pol agencies gradually develop. Poneglyphs are hidden across the world. Fish-Man Island agrees to hide one (Joy Boy’s apology). Wano isolates itself to protect the Poneglyph creators.