Wars and Battles

First Great Shinobi World 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 of the great wars that involved the majority of shinobi villages and countries. There are few reliable surviving records of this war, but the experiences of this war led to the birth of the tactics that still form the cornerstone of warfare. It ended with an armistice treaty, but only after all of the Five Great Nations had been seriously damaged. Even then, the peace only lasted another twenty years until the Second Shinobi World War erupted

Second Great Shinobi World War
The Second Shinobi World War (第二次忍界大戦, Dainiji Ninkai Taisen, English TV: Second Great Ninja War) was the second of four great wars involving the majority of the shinobi villages and countries. Not much is known about the politics of this era, but there were known conflicts between Konohagakure, led by the Third Hokage, Sunagakure, likely led by the Third Kazekage, Amegakure, led by Hanzō of the Salamander, and Iwagakure, presumably led by the Third Tsuchikage. The majority of the fighting seems to have taken place in minor countries like Amegakure, leaving them devastated. The eventual outcome of the war seems to have been in favour of Konoha. Nagato referred to it as a war Konoha started.

Third Great Shinobi World War
The Third Shinobi World War (第三次忍界大戦, Daisanji Ninkai Taisen, English TV: Third Great Ninja War) was the third of the four shinobi wars that involved the majority of the shinobi villages. It took place more than ten years prior to the beginning of the series. Because of a decline in national power, the reign of the Five Great Shinobi Countries was crumbling. Along their borders, skirmishes with smaller nations broke out all the time. The prolonged conflicts gradually spread their flames far and wide, until at last it developed into an all-out war. The conflict turned into an unprecedented war of attrition, tormenting all nations with a shortage of war potential. Not even excluding a great power like Konoha, very young children, some of whom were barely out of the Academy were thrown onto the battlefield, eventually losing their young lives during the war.

Fourth Great Shinobi World War
The Fourth Shinobi World War (第四次忍界大戦, Daiyoji Ninkai Taisen, English TV: Fourth Great Ninja War) was a conflict between the Allied Shinobi Forces and Akatsuki. The battle began on the 8th of October and lasted until the 10th, with the complete victory of the Allied Shinobi Forces, the collapse of Akatsuki, and the sealing of the Ten-Tails.