New Marineford

New Marineford is an island in the New World that currently contains Marine Headquarters. It formerly contained the Marine Base G-1 until after the Battle of Marineford, when Fleet Admiral Sakazuki switched the bases' locations.

Layout
Little is known about the geography surrounding the Headquarters, but part of it appears to be rocky. Small bubbles populate the air, similar to those produced by the Yarukiman Mangrove in the Sabaody Archipelago.

The Marine Headquarters is built in a mainly western style, in contrast to the one on Marineford which resembled ancient Japanese architecture. The biggest feature of the base is two massive arches that converge on the center of it. The base is surrounded by a circular stone wall lined with turrets, and rising above the wall from within it is a stone tower that has the Headquarters surrounded by a circular wall on top of it. The main Headquarters building has an ancient Japanese design just like the one on Marineford, with a large entrance and a pagoda-shaped upper structure.

During the Timeskip
After being promoted to Fleet Admiral, Sakazuki moved Marine Headquarters to New Marineford, and the G-1 Marine Base on this island was relocated to Marineford.

Dressrosa Arc
After Donquixote Doflamingo's resignation from the Shichibukai, Brannew held a meeting at Marine Headquarters to discuss this as well as Trafalgar Law's new alliance with Monkey D. Luffy.

Zou Arc
Kizaru received a report that the Shichibukai Edward Weevil had wiped out the A.O Pirates while at Marine Headquarters.

Reverie Arc
While reading about Luffy becoming one of the Yonko, Sakazuki received a report that Princess Komane of the Ilusia Kingdom was kidnapped by pirates while heading to the Reverie.

Trivia

 * The One Piece Film: Z, set after the timeskip, shows a different version of the Marine Headquarters base, resembling more a traditional Marine Base with its many towers built into the island and the wave-imitating paint job, giving it a far more militaristic feel, alluding probably to the fact that the new headquarters used to be G-1, and thus was originally a normal Marine fortress base.