Sealing of the Nine-Tailed Demon Fox

.The demon fox attack occurred 12 years before the start of the naruto series. The fox almost destroyed the leaf village but failed to do so due to the 4th hokage's interference.The 4th ended the destruction by sealing the beast in a new born baby who just happened to be his son, Naruto.

.It is believed by Jiraiya that the one who summoned the fox was a man called Madara Uchiha, but Madara claims that the event was a natural disater and that he was not involved, even though he orignally controlled the fox with his Mangekyo sharingan.

.The Defeat of the demon fox made the 4th hokage a legendary hero thoughout Konoha and the world, but it made naruto look like he was the one responsible. He was shunned by the village and grew up an orphan with a lonely childhood.

.Ever since the attack the fox has lived a life of imprisionment for 16 years within naruto.