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" o "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 o 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.