A 14-year-old boy lies about his age and enlists in the United State Marine Corps without his family's consent or knowledge. He is sent into battle in the Pacific war-zone, decorated, and spotted in a newsreel by his family. The family asks the War Department to discharge him and send him home.

Introducing Private Snafu, the nation's worst soldier and his various versions in different branches of the armed forces. The cartoon, ironic and humorous in tone, was created during World War II and it was designed to instruct service personnel about security, proper sanitation habits, booby traps and other military subjects, and also to improve troop morale.The main character's name is a play on the military slang acronym SNAFU, "Situation Normal: All Fouled Up."

Private Snafu steals secret Japanese war plans, is captured and tried. He escapes and rows out to sea.

Private Snafu is the title character of a series of black-and-white American instructional cartoon shorts produced between 1943 and 1945 during World War II. The character was created by director Frank Capra, chairman of the U.S. Army Air Force First Motion Picture Unit, and most were written by Theodor "Dr. Seuss" Geisel, Philip D. Eastman, and Munro Leaf.[1]

二战期间，各国为了探听对方的军事机密广派间谍，无所不用其极。美国大兵斯纳夫（Mel Blanc 音）将于下午4点半乘军舰开赴非洲。这是一项军事机密，轴心国的间谍们紧紧跟在斯纳夫的身后，渴望探听出航的时间。傻乎乎且盲目自信的斯纳夫认为自己可以守住这个秘密，但几杯酒下肚，他的意识完全放松，面对性感美女将军事机密和盘托出。而这个消息第一时间被传往希特勒的手中。 4点半，军舰起航，却很快遭到敌人潜水艇的包围和攻击……

A armada of malaria-laden mosquitoes seeks human targets and finds Private Snafu who fails to protect himself adequately against their onslaught.