Konoha Crush

The Invasion of Konoha was the planned invasion of Konohagakure by Otogakure and Sunagakure during the Chunin Exams. The Invasion was in truth Orochimaru's master plan for revenge on Konoha after the Third Hokage chose Minato Namikaze as the Fourth Hokage instead of him.

Plan
Sunagakure had a rocky relationship with Konoha, because it was the strongest village of the Five Great Nations. As time went on the Land of Wind's Daimyo started commissioning Konoha with requests he should have made to Sunagakure. On top of that, he began cutting back on Sunagakure's budget. The Fourth Kazekage realized that if he didn't act quickly, Sunagakure would be in danger of disappearing, so he joined forces with Otogakure in an attempt to destroy Konoha and force the lord to re-establish Sunagakure's military force if he wished for his Land to survive.

The plan was to wait for ninja in the crowd to place a genjutsu on the audience so that Orochimaru could get close enough to Hokage so that he would be able to trap himself and the Third in a dome created by his Sound Four. With the Hokage preoccupied, a giant Snake would be summoned and destroy part of the wall surrounding the village, drawing the attention of any defending shinobi as well as causing damage to buildings. Additionally, it served as an outside signal to the ninja of the Sound and Sand to break in (contrary to some beliefs, the wall did not need to be broken down for the ninja to infiltrate, since shinobi can climb walls. Instead, the main purpose of the snakes was a distraction.). The secret weapon of the attack would be the Sand's Jinchuriki, Gaara, the host of the One-Tailed Shukaku. Because Gaara could allow the Shukaku to take over, they could use the Shukaku to destroy Konoha. Orochimaru had also planned for Sasuke to be captured during the confusion created by Shukaku.

Battle
The battle began as soon as the genjutsu was placed as Hatake Kakashi, Might Guy, Sakura Haruno were unaffected by the jutsu. Because Sasuke Uchiha had injured Gaara enough to make him slip into his Jinchuriki Form, the examiner told Sasuke to follow Gaara and stop him, and that the exam was over. Kakashi told Sakura to wake up Naruto Uzumaki and Shikamaru Nara to stop Sasuke. While the three went after Sasuke, Guy and Kakashi stayed at the arena to prevent the enemy shinobi from attacking.