| Alliance against Kaido | |
|---|---|
| Name | Alliance against Kaido |
| Conflict | Onigashima Raid / Wano Campaign |
| Date | circa Sabaody Archipelago timeline — Wano Country arc |
| Place | Wano Country, Onigashima, waters of the New World |
| Result | Defeat of Beast Pirates' leadership; destabilization of Kaido's regime |
| Combatant1 | Straw Hat Pirates; Heart Pirates; Minks; Kozuki loyalists; Samurai; Allied Ninja-Pirate-Mink-Samurai Forces |
| Combatant2 | Beast Pirates; Kaido; Tobi Roppo; Numbers |
| Commander1 | Monkey D. Luffy; Trafalgar D. Water Law; Tonoshiro; Kozuki Momonosuke; Tama |
| Commander2 | Kaido; Big Mom (temporary ally); Orochi (proxy); Queen; King |
Alliance against Kaido
The Alliance against Kaido was a large, ad hoc coalition formed to overthrow the domineering rule of Kaido and the Beast Pirates in the Wano Country arc of One Piece. Brought together by necessity and shared grievances, the Alliance combined pirate crews, native samurai, exiled retainers, and allied peoples to challenge an unparalleled warlord. Its importance lies in coordinating disparate forces to confront an entrenched tyranny and reshape the political order in Wano and the wider New World.
The alliance emerged from long-standing resistance to the shogunate of Kurozumi Orochi and the occupation by the Beast Pirates under Kaido's suzerainty. After the revelation of Orochi's collusion with Kaido and the subjugation of the Kozuki clan, surviving loyalists including Kozuki Oden's retainers and the exiled heirs worked with outside actors. The arrival of the Straw Hat Pirates and the Heart Pirates reignited plans for revolt. Key catalysts included the successful liberation efforts by Sengoku-linked allies elsewhere, intelligence supplied by spies such as Kanjuro's exposed betrayal, and the strategic partnership between Monkey D. Luffy and Trafalgar D. Water Law. The alliance formalized as an operational coalition combining the interests of pirates, samurai, and the indigenous Mink Tribe.
The coalition was notably diverse. Prominent pirate participants were the Straw Hat Pirates led by Monkey D. Luffy and the Heart Pirates under Trafalgar D. Water Law. Complementary pirate forces included remnants of the Kid Pirates' allies and sympathetic crews like the Kidd Alliance in strategic support roles. Indigenous forces comprised the Minks of Zou (including leaders such as Pedro and Inuarashi), while the native resistance of Wano included the samurai retainers of the Kozuki clan — notably Kozuki Momonosuke, Kin'emon, Kikunojo, and Kawamatsu. Military leadership integrated experienced commanders: Kin'emon and Inuarashi oversaw land operations, while pirate captains coordinated naval and frontal assaults. Ad hoc contributions came from figures like Tama (whose Devil Fruit influence mobilized allies), and defectors from the Beast Pirates offering intelligence. Opposing commanders under Kaido included the Calamities — King, Queen, and Jack — and the elite Tobi Roppo.
The Alliance's campaign culminated with the coordinated assault on Onigashima during an unprecedented raid timed to coincide with a political festival in Kuri District. Prior phases included disruption operations against Beast Pirates supply lines, liberation missions in Udon, and guerrilla-style uprisings led by Kozuki loyalists across multiple provinces. On Onigashima, the coalition executed a multi-front plan: infiltrators sabotaged defenses while the main strike force engaged Kaido's lieutenants. Key battles included confrontations with Queen and King, the duel between Luffy and Kaido, and an internal purge of Orochi's collaborators. Naval engagements occurred around Wano's coasts, where Minks and pirate reinforcements intercepted Beast Pirates' reinforcements. The campaign combined siege tactics against strongholds like Beasts' Fortress and decisive one-on-one duels that removed high-ranking adversaries from the order of battle.
Strategically, the Alliance balanced irregular warfare with conventional set-piece battles, emphasizing unity of command and shared intelligence to offset Kaido's numerical superiority. Tactically, they employed diversionary raids, sleeper agents within Orochi's court, and the unique abilities of Devil Fruit users for targeted strikes. Naval operations were coordinated by experienced captains to prevent Kaido's reinforcements by sea, utilizing knowledge of currents around Wano and the stealth capabilities of minks for coastal insertion. Logistics leaned heavily on the local population's support networks and supply caches established by the Kozuki loyalists. The alliance also exploited Kaido's overconfidence, forcing him into unfavorable terrain and timing assaults to neutralize aerial advantages provided by flying units such as King.
The campaign resulted in the collapse of Kaido's immediate dominion over Wano: several high-ranking Beast Pirates were killed or captured, and Orochi's regime was dismantled. While Kaido himself endured several defeats and suffered strategic setbacks, the long-term resolution altered Wano's sovereignty, allowing the restoration of the Kozuki leadership under Kozuki Momonosuke and the reestablishment of traditional institutions. The power vacuum prompted regional realignments in the New World; pirate alliances recalibrated, and the World Government took renewed interest in Wano's stability. Casualties and infrastructure damage were substantial, necessitating reconstruction and reconciliation efforts led by surviving samurai and community leaders.
Politically, the Alliance's success reaffirmed Wano's autonomy and revived samurai traditions suppressed under Orochi and Kaido, reinforcing themes of heritage and national cohesion. The restoration of the Kozuki archive and the re-opening of trade routes allowed cultural revival and a reassertion of local governance structures. Internationally, the campaign signaled a shift in power dynamics: the weakening of Kaido affected the balance among the Four Emperors and emboldened other actors such as Big Mom and emerging pirate captains. The effort also influenced public sentiment across the Grand Line, inspiring resistance movements against oppressive regimes and prompting debates within the World Government about intervention and recognition of renewed national authorities. Category:One Piece