In the end, an armistice treaty was signed, establishing twenty years of peace between them the peace was ended by the start of the Second Shinobi World War. The war took a heavy toll on the Five Great Shinobi Countries, badly damaging each of them. Before he died, Tobirama appointed one of his students, Hiruzen Sarutobi, to be the next Hokage. Tobirama would go on to die during the war, killed in battle with Kumogakure's Kinkaku Force he acted as a decoy so that his subordinates could escape. His successor as Hokage, Tobirama Senju, attempted to continue Hashirama's pursuit of peace, but even his efforts could not stop the beginning of the First Shinobi World War. Although this did bring an end to smaller wars, conflicts of the era began to escalate and Hashirama ultimately died in battle.

Hashirama and his fellow Kage hoped that dividing the tailed beasts among their villages would create a power balance, thus establishing peace between them. In the lead up to the war, Konoha's First Hokage, Hashirama Senju, distributed the tailed beasts to the other hidden villages, something that was discussed and agreed upon at the first ever Kage Summit. According to Ōnoki, the war was a result of countries and their hidden villages taking resources from other countries and other hidden villages Madara Uchiha's demand that Iwagakure be subservient to Konohagakure is implied to be the first such example of this. The war's outbreak plunged the world into a chaos not seen since the end of the Warring States Period, for which reason there are very few records about the war. The First Shinobi World War ( 第一次忍界大戦, Daiichiji Ninkai Taisen, English TV: First Great Ninja War), or simply the Shinobi World War ( 忍界大戦, Ninkai Taisen, English TV: Great Ninja War), was the first major conflict to occur among the Five Great Shinobi Countries. The Second Hokage and his team during the war.

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