Episode 471

"The Extermination Operation Begins - The Might of the Pacifista Army" is the 471st episode of One Piece.

Short Summary
The Pacifista enter Marineford as part of Sengoku's plan to win the war against Whitebeard. It appears that part of Sengokou's plan failed as all the pirates were to be inside the bay but Sengoku gives the order to attack all the pirates allied with Whitebeard outside the bay first. The Pacifista are then activated and destroy most of the allied pirates. Sengoku then goes on to say that the encircling walls should be activated once all video feeds are cut. However, the prisoners of Impel Down have captured one of the Den Den Mushi so that they could advertise their 'saviour' captain Buggy. Mihawk's battle with Vista is coming to a hasty conclusion and Luffy briefly encounters an admiral. The episode ends as the captain of an allied crew (Squardo) betrays Whitebeard and stabs him in the chest with a sword.

Anime and Manga Differences

 * Vista didn't name any of his attacks during his fight with Mihawk in the manga, but in this episode he uses one named attack.