East Blue Navy

Biodata

Feature	Information
Name	East Blue Navy (东海海军)
Former designation	Marine Branch 16 / the East Blue 16th Branch 3 236 341
Leader	Xia Che, formerly Base Commander of Marine Branch 16 115 285
Affiliation	East Blue; formerly under Marine Headquarters 236 315
Occupation/Role	Military and governing force responsible for East Blue security, expansion, infrastructure, and pirate administration 257 347
Status	Active; declared war on the World Government in August, Sea Calendar 1521 550
First Appearance	Identified by the name “East Blue Navy” during the Marineford deployment 236

Background / History

Marine Branch 16 era

Before adopting its present name, the organization operated as Marine Branch 16, led by Xia Che. The branch repeatedly requested military funding while resisting the Moke Pirates, leading Marine Headquarters to suspect it of budget fraud until the pirates’ threat was confirmed. 3 12

Branch 16 expanded beyond Marine Headquarters’ authorized personnel and warship limits, independently financing its excess forces. Xia Che planned to train personnel using the Six Powers and adapted forms of Water Breathing, though Guina was the only documented trainee to grasp even a small part of the latter technique. 14

The branch endured the East Blue Pirate Feast, during which a mass pirate force breached its defenses and devastated its base. It was later credited with repelling the East Blue Overlord alongside Smoker and suppressing a revival of East Blue pirate activity. 22 115

Defection and reorganization

Marine Headquarters eventually identified Branch 16 as a rebel force. When it arrived at Marineford, its warship no longer bore the “16” designation; both its sails and hull instead displayed “East Blue,” marking the organization’s public transformation into the East Blue Navy. 233 236

The East Blue Navy introduced New Pirate Regulations, allowing pirates to leave for the Grand Line only after meeting designated conditions and certifications. Most East Blue pirates accepted the system, while unlicensed pirates found it increasingly difficult to hide from the navy. 257

By the time of its campaign to occupy the East Blue, the navy controlled more than half the sea and had surrounded remaining Marine Headquarters branches and affiliated nations. Xia Che chose to proceed with full unification despite the risk that unpaid Heavenly Gold would draw World Government attention. 295

Unification and war with Marine Headquarters

The navy mobilized dozens of warships and large numbers of trained soldiers for the decisive confrontation near Reverse Mountain. During the operation, Issho learned that the East Blue Overlord was secretly an ally of the East Blue Navy and that the World Government had been deceived about their relationship. 309

After the East Blue Navy’s victory, the East Blue returned to relative stability and the Pirate Guild resumed flourishing under the new order. 312

The World Government responded to the navy’s unification of the East Blue by authorizing a Buster Call. The attack failed in October, Sea Calendar 1519, after which Marine Headquarters entered negotiations with the East Blue Navy. 315 336

At the negotiations, the East Blue Navy demonstrated overwhelming naval strength, forced the Marine Headquarters fleet to dock under its control, and presented demands backed by a threat against Mary Geoise. 341 342

Expansion beyond the East Blue

The navy later occupied Fish-Man Island, treating its location as a strategic route into the New World and stationing forces to screen incoming pirates and maintain order. 454 456 458

It also attacked the Sabaody Archipelago, destroying slave auction houses and rescuing captured Fish-Men and Mermaids. The operation escalated into a confrontation with Marine Headquarters reinforcements. 461 462

In August, Sea Calendar 1521, the East Blue Navy openly declared war on the World Government. 550

Organization and Capabilities

Area	Documented capabilities
Senior combatants	Xia Che, Zephyr, Issho, Bartholomew Kuma, Kuro, and Enel formed its documented high-end combat power during the East Blue occupation campaign. 295
Training system	Recruits receive swordsmanship, hand-to-hand combat, the Six Powers, and Kuro’s Silent Step. The Marine Academy also employs specialized instructors and training tools. 85 210 211
Enhancement medicine	Small Blue Pills, Blue Bottles, and later a giant version of the Small Blue Pill improve physical fitness and support Haki training, though the giant pill has demanding use requirements. 226 297
Naval strength	Uses standardized armaments, warships distinct from Marine Headquarters vessels, and ship-mounted weapons superior to conventional Marine cannons. 327
Heavy weapons	Enel can remotely control electromagnetic cannons with enough precision to strike specific Sabaody targets. 461
Surveillance	Registers East Blue residents and their auras, using a monitoring system that alerts authorities to unregistered infiltrators; the network was later deployed across islands. 297 347
Border control	Maintains energy barriers and designated safety routes, inspecting arrivals and protecting civilian vessels. 427 428
Communications	Developed Armored Den Den Mushi technology for multi-person online communication and broader information access. 280 402

Governance and Civil Administration

Pirate Guild and regulations

The Pirate Guild functions as the East Blue Navy’s framework for managing pirate activity. Pirates seeking to enter the Grand Line are expected to comply with its requirements, while authorized users can access its broadcast and communication systems. 257 312

• Pirates captured after the Reverse Mountain battle were screened; those deemed incorrigible were removed, while others were sent to newly occupied regions to address labor shortages. 313
• The navy’s regulations shifted East Blue piracy away from unrestricted activity, making unlicensed crews easier to locate and suppress. 257

Security and public welfare

The East Blue Navy established safe sea routes, removed barriers between islands, protected civilian property, created jobs, and suppressed pirates. These measures gave it substantial public confidence even during the Buster Call crisis. 321

• Civilian passenger routes are designed for safe waters and provide affordable travel between islands for workers seeking employment. 405
• The navy registers inhabitants, monitors unauthorized arrivals, and patrols designated maritime safety routes. 297 347 428
• Fish-Men entering its safety route observed extensive protections for ordinary civilians at sea. 428

Infrastructure and industry

• Sea Train network — Began building Sea Trains to connect prosperous islands; the Goa Island–Polar Star Archipelago line became its first operational route and was described as independently developed by the navy. 347 408
• Inter-island transport — Plans include expanded shipping routes, bridges, and passenger services across the East Blue. 347 405
• Technology development — Works with Vegapunk, Old Bei, and other researchers on weapons, sea-beast technology, construction tools, communications equipment, and transport systems. 350 373
• External development aid — Supplied Alabasta with equipment including seawater purifiers and localized temperature-control systems. 481

Relationships

• Xia Che — Leader of the East Blue Navy; directs its military campaigns, territorial policy, infrastructure projects, and negotiations. 285 295 342
• East Blue Overlord Moke — Publicly presented as an adversary, but secretly an ally of the navy; this alliance was revealed to Issho before the Reverse Mountain operation. 309
• Marine Headquarters — Former parent organization and principal military rival; regards the East Blue Navy as a rebel force. 233 315
• World Government — Political enemy that authorized a Buster Call, later negotiated under East Blue Navy pressure, and remains at war with the organization. 315 342 550
• Pirate Guild — Regulatory partner used to control pirate movement and Grand Line access. 257 312
• Fish-Man Island — Occupied and administered as a strategic gateway to the New World; East Blue Navy patrols now screen incoming pirates. 454 456 458
• Sengoku and Garp — Former Marine Headquarters leaders who later joined the East Blue Navy. 550
• Zephyr — Former Marine Headquarters chief instructor who became a core high-end combatant and training leader. 211 295

Major Operations

Operation	Outcome
East Blue Pirate Feast defense	Marine Branch 16 suffered severe damage when pirates breached its base but continued resisting and was later credited with repelling the East Blue Overlord. 22 115
New Pirate Regulations	Established certification-based passage to the Grand Line and made unlicensed piracy harder to sustain in the East Blue. 257
East Blue unification campaign	Expanded from control of more than half the East Blue to full regional unification after the Reverse Mountain confrontation. 295 309 315
Buster Call defense	Survived the World Government and Marine Headquarters’ Buster Call, which failed in October, Sea Calendar 1519. 315 336
Fish-Man Island occupation	Secured Fish-Man Island, screened incoming pirates, and began restructuring local security and military training. 454 458 459
Sabaody anti-slavery attack	Destroyed slave auction houses, rescued Fish-Men and Mermaids, and fought Marine forces sent to stop the operation. 461 462
War declaration	Formally declared war on the World Government following the news of Laugh Tale’s discovery. 550