La Nueva Alianza Shinobi

The Allied Shinobi Forces (忍連合軍, Shinobi Rengōgun) is a coalition between the collective military might of the hidden villages of the shinobi nations of the Lands of Lightning, Water, Earth, Wind, and Fire, and the lone samurai nation of the Land of Iron. The purpose of this alliance is to stand up together against the threat of the Akatsuki organization and the tailed beasts, in the Fourth Great Shinobi World War. Because of the deceitful actions of the candidate Sixth Hokage Danzō Shimura, the other Kage asked Kakashi Hatake about the Land of Fire's Hidden Village of Konohagakure's entrance into the alliance. However, before Kakashi was made Hokage, Tsunade woke up from her coma, and resumed her post as Hokage. After the summit, the five daimyo agreed to give power to their Hidden Villages, making the Shinobi Allied Forces official.
The coalition was formed after Madara Uchiha's declaration of war after the five Kage's and the head of the Land of Iron, Mifune, unanimously refused to hand over Killer Bee and Naruto Uzumaki, the jinchūriki of the Eight-Tailed Giant Ox and the Nine-Tailed Demon Fox respectively. When Madara departed, the Kage and Mifune discuss their plans on dealing with Madara and the tailed beasts and later Mifune suggested that the Fourth Raikage be the Supreme Leader (大権, Taiken) of the alliance to which the other Kage agreed.