Well, I've discovered where the Dardanelles bit came from: it was current in the trenches in WWI, the following is in Tommy's Tunes (Vol 2 1917), which was the start of Oh! What A Lovely War!

Tune: Hiawatha [I presume something from Samual Taylor Coleridge's magnum opus - R]
When the moon shines bright on Charlie Chaplin,
He's going balmy
To join the Army ;
And his old baggy trousers want a-mending
Before they send him
To the Dardanelles.