First Shinobi World War

The, or simply the , was the first of the great wars that involved the majority of shinobi villages and countries. Little is known about what happened during this war.

The war started not long after the system of one shinobi village per country was established by the founding of Konohagakure. To try and maintain a balance of power, the First Hokage divided the Tailed Beasts among the villages. This was not enough to prevent the war, though, and might have actually increased hostilities.