Eye of the Moon Plan

The is Madara Uchiha's ultimate plan for world domination, which seems to involve using Sasuke Uchiha to synchronize with the Demonic Statue of the Outer Path, which holds seven of the nine tailed beasts gathered by Akatsuki. Madara notes that after Sasuke has failed to capture Killer Bee and the Eight-Tailed Giant Ox, he has been cautious for too long, and that it is time to emerge from the shadows and commence with this plan. During his attack on Konoha, Madara named "starting a war to bring peace" as the reason for the attack, a poetic way to describe his ultimate plan.

After Madara revealed this plan to four of the five Kage at the Land of Iron, they responded in refusing to hand over the last two jinchūriki, Naruto Uzumaki and Killer Bee, and formed an Allied Shinobi Forces to prevent the Eye of the Moon Plan from succeeding.

The Plan
Madara's plan is to gather all the tailed beasts in order to fuse them back into their original form, the Ten-Tailed Beast. He will then become the jinchūriki to the Ten-Tails, giving him immense power and the ability to project his Mangekyo Sharingan on to the moon. He intends to use the moon, the prison of the Ten-Tails body, to cover the world in an "Infinite Tsukuyomi", thereby letting him control every living being, creating a world in which no war or crime occurred.

Part of his plan was to have Zetsu attract the attention of the five Kage at the Kage Summit and lure them to fight against Sasuke Uchiha. In doing so, Madara hoped that the five would be weakened enough for him to take them as hostages to negotiate the capture of the Eight-Tailed Giant Ox and Nine-Tailed Demon Fox. This, however, ended in failure, due to Sasuke exhausting himself almost to the point of death after combating the combined forces of the Fourth Raikage and his bodyguards, the Fifth Kazekage and his bodyguards, Mifune, the Fifth Mizukage and one of her bodyguards, and the Third Tsuchikage. Meanwhile, Danzō Shimura, the Candidate Sixth Hokage, escaped.

Trivia

 * Due to his constant interference, Madara has blamed Naruto for the plan's slow progress.