This short animated film is the introductory release for the Private Snafu Series; an educational series for US service personnel produced for the US government during World War II.
"He's the goofiest solder in the U.S army."
Directed by Chuck Jones.
I believe that this cartoon is in the public domain due to it being a work for or by the US Government. Many films produced for the US Government are public domain since they were paid for with US tax dollars.