What episodes does the 4th Great Ninja War?
It spans through volumes 55 to 59, or more specifically, covers chapters 516 to 559 of the manga and episodes 261 to 270, and also picks from 272 to 289 of the Naruto: Shippūden anime and later picks up from episodes 296 to 310, and 312 to 321.
How long was 4th Great Ninja war?
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.