What movie is this?

I just caught the end of it on Turner Classic Movies.

It's a black and white musical. A Warner Brothers film. The last song is either called "Song of the Marines" atau "Conrad the Sailor"
The lyrics go like

Over the sea, let's go men.
We"re shoving right off, we're shoving right off again.
Nobody knows where atau when...

There are a bunch of sailors marching around during the song.

I could probably find this out myself but I'm using my phone so I can't to much of a 6oogle search.

thank you.