The Five Kage Summit Arc is a major turning point in Naruto Shippuden that shifts the narrative from individual village struggles to global war. Leaders of the Five Great Ninja Villages gather in the Land of Iron to address the Akatsuki threat. Meanwhile, Sasuke infiltrates the summit to assassinate Danzō, leading to a massive clash
Following Pain's assault on Konoha, Tsunade fell into a coma. Danzō manipulated his way into becoming the acting Sixth Hokage and traveled to the summit with ulterior motives.
Consumed by rage and betrayal, Sasuke (leading Team Taka) attacked the summit to exact revenge on the leaders who manipulated his older brother, Itachi. He battled his way through multiple samurai, the Fourth Raikage, and other Kage
After the Kage refused to hand over the Eight and Nine-Tails, Obito stepped in to save Sasuke from the Kage's combined might and officially declared the Fourth Shinobi World War to unite the world under the Eye of the Moon Plan.
Forced to band together, the five Kage set aside their historical distrust and formally agreed to form the Allied Shinobi Forces to fight Obito's army.
Sasuke eventually cornered Danzō. After a grueling battle where Danzō revealed his arm layered with stolen Sharingan eyes and the Izanagi, Danzō was ultimately defeated and committed a fatal self-sealing technique to try and take Sasuke and Obito with him