Snafu inadvertantly starts a panic on his base when he begins a mistaken rumour that the base is about to be bombed.
Writing
Dr. Seuss wrote this—yes, THAT Dr. Seuss, getting unhinged.

Director
Friz Freleng
Trivia, insights & behind the scenes
Dr. Seuss (Theodor Geisel) wrote the Private Snafu series while serving in Frank Capra's animation unit—these were literally classified training films for soldiers.
The 'telephone game' panic sequence became a template for decades of 'misinformation spreads' visual gags in animation and film.