: Hundreds of Marines and lower-level pirates across the battlefield were knocked unconscious.
While Luffy had used Conqueror’s Haki subconsciously before—notably against in Episode 389 and the Boa sisters in Episode 413 —the Marineford incident was different in scale and significance: luffy conqueror's haki marineford episode
However, the most famous cited for this moment is Episode 474 (title varies: "Execution of the Admiral" or "Conqueror's Haki" depending on the sub/dub). : Hundreds of Marines and lower-level pirates across