Marineford

It is where the Fleet Admiral and the three Admirals resided, along with many Vice Admirals and lower officers when they weren't assigned to another base. The city surrounding Marine HQ was inhabited by the families of Marine soldiers. It is situated near the Sabaody Archipelago, and lied directly next to Mariejois on the Red Line. The huge palace in the centre is for the admirals. The city surrounds the palace. To the south is the bay, which acts as the entrance to Marineford and is the main location of the great Whitebeard War.