The World Government is a global regime that has ruled the world for over 800 years since founded by an alliance of 20 different kingdoms. It has since vastly grown in influence and now spans across more than 170 of the world's civilized countries.
The World Government is lead by the Five Elders who in actuality answer to a sovereign entity known simply as Im, whose existence is kept a secret not known within the World Government or the world.
The Marines serve as the government’s official military branch, headed by the Fleet Admiral, while the Cipher Pol acts as their secret police, operating through sabotage, reconnaissance, spying, espionage, and/or assassination. The government’s most prominent enemies mainly consist of pirates and revolutionaries.
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.
Enies Lobby, also known as the Judicial Island, was a government-controlled stronghold in Paradise. Enies Lobby is located on an island referred to as both the "afternoon island" and the "never-night island". It was one of the World Government’s three major strongholds and the headquarters of CP9.
Due to the Straw Hat Pirates, the Galley-La Company, and the Franky Family invading, as well as the subsequent Buster Call, the island has been completely annihilated and left in ruins. It is unknown if the island was rebuilt since but there are rumours floating around the Grand Line and beyond.
Impel Down serves as the World Government's most impenetrable maximum-security prison.
The Commander-in-Chief oversees both the Marines and Cipher Pol, at least officially, and ranks directly below the Five Elders. The Commander-in-Chief also has authority over the Seven Warlords of the Sea.
Commander-in-Chief (requires level 90):
-Kong - 90