: The "Fourth Shinobi World War: Confrontation" arc begins slightly earlier in Episode 261 , "For My Friend," which features Gaara’s moving speech to the assembled Allied Shinobi Forces.
While the physical fighting starts then, the war's timeline spans several arcs: 4th great ninja war start episode
In the Naruto: Shippuden anime, the Fourth Great Ninja War officially begins in , titled " War Begins! ". : The "Fourth Shinobi World War: Confrontation" arc
The actual combat of the Fourth Great Ninja War officially starts in . "For My Friend