In Year 57 of Konoha, another earth-shaking incident occurred in the shinobi world.
During the Fourth Shinobi World War, Shisui Uchiha—the hero of Konoha and rising star of the Uchiha Clan—had actually infiltrated Kirigakure alone. Surrounded by dozens of Kirigakure Anbu, he forced his way into the Mizukage Building and powerfully killed on the spot the mysterious man who called himself Uchiha Madara, the Fourth Mizukage Aide who also possessed the Sharingan.
Not even those dozens of Kirigakure Anbu had been spared. Shisui Uchiha used an unknown method to torture them into idiots, turning them into empty shells devoid of thought.
This was practically Shisui Uchiha single-handedly challenging Kirigakure, one of the Five Great Shinobi Villages. Neither Hashirama Senju, the God of Shinobi, nor the real Uchiha Madara, the Asura of the Shinobi World, had ever accomplished such a feat. Yet decades later, an eighteen-year-old Uchiha youth had done it, throwing the entire shinobi world into an uproar.
Everyone had assumed that, after suffering such a humiliating invasion, Kirigakure would launch unilateral retaliatory action against the Land of Fire and Konoha.
After all, Kirigakure had sat out both the Third Shinobi World War and the Fourth Shinobi World War, so its overall strength had not been drained by war. Even if it had not progressed in the slightest, compared to the other four great shinobi villages, which had suffered considerable losses in both wars, Kirigakure's immediate combat strength ranked among the very best of the Five Great Shinobi Villages.
With such strength, none of the other Five Great Shinobi Villages would have dared casually wage war against and invade Kirigakure. Yet Shisui Uchiha had done exactly that on his own.
Thus, in the eyes of every nation, whether to preserve its dignity as one of the Five Great Shinobi Villages