The attack of the Nine-Tailed Demon Fox, coincided with Kushina Uzumaki, the Nine-Tails' second jichūriki, giving birth to her newborn son Naruto Uzumaki on the night of October 10th. During a female jinchūriki's pregnancy, the energy used to maintain the seal has to be redirected to the growing child in her womb, whether consciously done or not. As a result, the seal used on the beast weakened in direct proportion, and as such special preparations have to be made when a female jinchūriki is about to give birth as the seal may break experienced something similar when the previous jinchūriki of the Nine-Tails, Mito gave birth, the Third Hokage Hiruzen Sarutobi took multiple precautions to have the birthing be performed in secret, on the village's outskirts, surrounded by a barrier with an elite team consisting of his wife Biwako and Taji along with a few ANBU stationed outside as security. Minato would also accompany them in order to keep the seal in check during the process.

However, the childbirth location was discovered by Tobi, who learned the information by observing Kakashi at the Konoha memorial. Making his way to the site, Tobi killed the ANBU stationed outside and later Biwako and Taji after the child had been the newborn Naruto at ransom, he forces Minato to leave the cave via the Flying Thunder God Technique when he sets off the explosive tags he had placed on the newborn's prayed that Naruto wasn't injured but he checked Naruto was just bleeding.

Taking advantage of Minato's absence, Tobi forcibly extracted the Nine-Tails from a visibly exhausted Kushina while noting that the Four Symbols Seal also carried the Flying Thunder God Technique seal as a security measure which would enable Minato to teleport to his wife's aid at any time. As the Nine-Tails finally emerged from the seal, Tobi used his Sharingan to put the beast under genjutsu and commanded it to destroy Konoha. Kushina who survives the extraction a feat which Tobi accredits to the famed vitality of the Uzumaki begs Tobi to stop as he orders the Nine-Tails to kill its former host. Minato however arrives in time to save her. The Hokage carried her to his safe-house where he left Kushina with Naruto before heading off to protect Konoha.

Even from a distance, several ninja include a young Itachi Uchiha could sense the disturbance. Tobi successfully sneaked into the village and summoned the Nine-Tails into the village. When Hiruzen felt the Nine-Tails' familiar power and malevolence,he sent a ninja dog with a message to his older brother Horizon saying"Big brother i request your assistance the village is under attack by the nine tails" the ninja dog had gone to deliver the message, he immediately prepared for battle prior to an ANBU arriving to inform him of the Nine-Tails' attack. He ordered every shinobi nearby to prepare to defend the village.

Minato arrived on top of the hokage monument, which the Nine-Tails quickly noticed, and attacked him with the Tailed Beast Bomb,(To form the attack, they gather both positive black chakra and negative white chakra shape it into a sphere, and then compress it inside their mouth. The black and white chakra needs to be balanced at an 8:2 ratio respectively or it will backfire. The ball can be fired differently, either in sphere form, which can be detonated for a wave explosion or launched to form a dome-shaped blast which flattens and erases everything around it, or as a concentrated beam of energy which gives it explosive penetrative power. A Tailed Beast Ball is incredibly dense, when the tailed beasts jinchuriki's us this jutsu the ground around him sunk beneath his weight after he swallowed used in close proximity to other tailed beasts performing the technique, the Tailed Beast Balls can be combined, vastly increasing the attack's destructive power and its density, the Tailed Beast Ball is extremely fast when launched, able to cross an entire sea in a few seconds) but Minato teleported the blast away from the village. Before Minato could tell Hiruzen of what had happened at the birthing location, Tobi teleported to Minato and engaged him, but Minato teleported away from the village. Tobi followed suit, and after analysing his abilities, Minato questioned whether the masked man was Madara Uchiha. Giving no definite answer, Tobi attacked Minato as both use their respective space-time technique to avoid the struggle, Minato carefully threw his special kunai at Tobi, which the latter allowed to phase through his head, and just as it did, Minato teleported right above his opponent, and landed a timely Rasengan in his back, severely injuring him.

A bewildered and struggling Tobi tried to escape, but Minato, having placed his Flying Thunder God Technique seal on his body as well after his attack, teleported to his location, and placed another seal on Tobi ,releasing the Nine-Tails from his control. Proclaiming that Minato truly deserved his title of Hokage for this feat, Tobi teleported away, promising that the Nine-Tails would once again be his.

Despite no longer being under Tobi's control, now motivated by its own malice towards the village responsible for being sealed in the first place, the Nine-Tails continued its rampage of Konoha. However, it was soon pushed outside of Konoha's premises by the village's shinobi. Hiruzen and other shinobi continued their attack on the beast, trying to push it back further. During this time, a young Iruka Umino was protected from the Nine-Tails by his mother as his father tried to help repel the beast. Ignoring his father's orders to leave, Iruka stayed, determined to protect his mother, but another shinobi soon whisks him away from the battle with his parents dying some time after. The younger generation of shinobi were all detained from the battle, despite their ranks which Kurenai Yūhi's father explained was because this was an internal issue, not war. They were moved to the outskirts of the village and protected in a barrier.

Minato returned to the village and was mortified at the destruction the beast had caused. Just as the Nine-Tails was about to fire another Tailed Beast Ball at Konoha, Minato summoned Gamabunta To hold off the Nine-Tails for the moment. Minato then managed to teleport himself and the beast away from the village and to his safe-house, letting the blast detonate without any casualties as he was able to retrieve his wife and child before the ball detonated Kushina, not one to lay there helpless, manifested chains and a barrier to both restrain and contain the Nine-Tails with the intention of replacing the beast within herself with the process killing them both. However, for various reasons including that death would not stop the Nine-Tails, not wanting his wife to die, or leave Konoha without such a valuable war deterrent, Minato decided seal the beast within his son using the Eight Trigrams Seal.

When Hiruzen and a few other shinobi finally caught up to Minato, they found him, Kushina, and Nine-Tails inside of a barrier which they could not enter and had to watch helplessly from the sidelines. Kushina, initially against their son becoming a jinchūriki, pleas with Minato to live and raise Naruto before being convinced that it is for their son's sake as it is for the village's. While Kushina held down the Nine-Tails with her chakra, Minato uses the Dead Demon Consuming Seal to seal away the Nine-Tails' Yin chakra within himself to weaken the beast ,which decreases dramatically in size , before proceeding to beginning the sealing process. Realising Minato's intentions, the Nine-Tails tries to kill Naruto to stop the sealing so he tries to kill them with his claw. However, The third hokage's older brother Horizon Sarutobi pushes Minato and Kushina out of the way and stop the Nine-Tails' claw from reaching Naruto, fatally wounding him in the said "Big brother why... why did... why did you kill yourself"

Horizon said "I did it for the sake of the village remember when we were kids

Flashback

young Hiruzen "Hey big brother if you can do any thing in the world what you do "I would want peace in our great shinobi world also I wish to become a stronger ninja if it came down to it I would I would sacrifice my life for my village so we could live in a united shinobi world"

end flashback

yea". Minato was about to start weaving the signs to seal him but horizen said weakly"Minato….. let me seal the nine tails into your son ruto so he have a nice family so Horizen sealed the nine tailed fox into Naruto" but since he didn't have enough chakra so both the yin and yang were sealed inside Naruto. Kushina was happy that naruto survived and that the village is safe,but she is also sad because Naruto has both yin and yang spirits in happy.

One year later

When Naruto was a year old Minato had taken naruto to the baby park. Naruto stumbled across a hidden chamber full of scrolls filled with forbidden jutsus but one scroll catches his eye,the scroll was a reanimation scroll. (Reanimation is a forbidding jutsu that only two people know Orochimaru and the second hokage(Tobirama senju) this jutsu allow a person to bring a fallen shinobi back to life and control them.). As he grabbed his son he tripped on a scroll when he got up he tried see what he tripped on, he found the scroll it said "THE NINE DEATH GODS".

Later that night

So when they got home Minato put Naruto down for a nap,Kushina was doing the dishes,right when Naruto fell asleep minato rushed to kushina and whispered"Naruto found a hidden room at the baby park". Kushina said"Oh really and what was in the room",Minato said seriously"It was a chamber full of scrolls and all of them filled with forbidden jutsu". Kushina dropped a plate and she said "Are you serious a whole chamber filled with them but I thought only the third hokage had access to rooms like that". So while naruto was asleep they hurried to the chamber,when we got there Kushina said"wow you weren't kidding this whole chamber is full of them". Minato said"and to make it worse i found a scroll on the reanimation jutsu and i took it just in case someone else ever finds this chamber but i doubt it"Kushina said puzzled"why"Minato said"because i'm going to put a sealing barrier on this chamber so no one can find it". Minato said " I just hope nobody ever finds this chamber". Kushina said happily "You would have never found that chamber without Naruto's help". They both yelled "NARUTO" on that instant hurried home as fast as they can hoping nothing had happened to their son but they had nothing to worry about their beautiful baby boy Naruto was still asleep.