PlotColonel Crumb sends Sergeant Blast on a secret mission to deliver top-secret missile plans to a general. He orders her to take Privates Oyl and Goon along with her. They bungle the job, and the Colonel arrives to check on their work.
Their foul-ups cause the Sergeant to blow her top. However, as usual, they get credit for saving the day: the plans never got delivered because Olive was reading the map upside-down and they ended up back at Fort Dragg because of her confusion.
The Colonel is overjoyed at this as he had made a mistake with the plans; he gave the Sergeant an envelope with his grocery list instead of the missile plans. If it was delivered to the General, he would have looked like a fool.