If you want the episode where the begins (with divisions fighting armies of reanimated shinobi), that is Episode 250 (or Episode 248 for the mobilization).
| Episode | Arc Section | Significance | |---------|-------------|---------------| | | Prelude to War | Formation of the Allied Forces, Naruto’s training. | | 247 | War Begins | Tobi declares war; first Edo Tensei battle. | | 248-249 | War Front | The main divisions mobilize. | | 250 | War Front | The “Battle of the Coast” intensifies. | 4th great ninja war start episode
October 10 (the day Naruto turns 17) 1. Episode Context The Fourth Great Ninja War does not begin with a single massive explosion, but rather with a formal declaration and the simultaneous activation of the Allied Shinobi Forces’ preparations. The specific episode where the war officially starts is Episode 247: “Rivals” . If you want the episode where the begins
Initiation of the Fourth Great Ninja War: Anime Episode Identification & Summary | | 248-249 | War Front | The main divisions mobilize
Episode 247 (titled “Rivals”)
Naruto Shippūden