We'll Knock The Heligo—Into Heligo—Out Of Heligoland!
is a World War I song written by John J. O'Brien and composed by Theodore Morse.
[1] The song was first published in 1917 by Leo Feist Inc., in New York, NY.
The sheet music cover depicts a terrified Kaiser Wilhelm II standing on top of Heligoland while shells are bursting in his back and United States sailors with guns are rushing toward him.
[2] The sheet music can be found at the Pritzker Military Museum & Library.