Episode 461: The Beginning of the Battle! Ace and Whitebeard's Past
One Piece Episode 461 „The Beginning of the Battle! Ace and Whitebeard's Past“. Adapts chapters 551–552. First aired: 2010-08-08.
- Read on in the manga from: Chapter 553 (Volume 57 – Summit War)
- Title (Japanese): 決戦の幕開け！ エースと白ひげの過去
- Title (romaji): Kessen no Makuake! Ēsu to Shirohige no Kako
- First aired (Japanese): 2010-08-08
- First aired (German): 2016-01-22
- Category: Story
- Arc: Marineford Arc
- Chapters adapted: Chapters 551, pages 17-19; Chapters 552, pages 2-15