Fron Island

Fron Island is a non-canon island located in the New World, very close to Totto Land. It is home to a Marine base commanded by Vice Admiral Prody.

The island was first seen on a map located in Zou that Nami perused, but has not been named except in Weekly Shonen Jump.

Geography
Fron Island is a circular-shaped island with a rocky coastline featuring several tall rock pillars. Within it is a giant circular plateau that has a forest growing on top of it, and there is a large basin in the middle of the plateau which contains a Marine base. There is a small inlet on one side of the island that leads to a gate to an opening through the plateau into the base.

Marine Base
A significant portion of Fron Island hosts a Marine base. Marine ships are able to enter it through a giant gate within the plateau. The base consists of several buildings, including the main place of operations as well as a warehouse storing food supplies.

Past
Sometime in the past, a Marine base was established on Fron Island in order to keep an eye on Big Mom.

Marine Rookie Arc
A ship full of reserve Marine forces arrived at Fron Island, among them being Captain Grount. While this happened, the Straw Hat Pirates snuck into the island in order to find food to eat. However, their presence was eventually discovered, and Monkey D. Luffy was spotted and cornered in the cafeteria.

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Illa Fron Île de Fron