Lt. Arthur McKeogh, “Whittlesey’s Other Answer,” Everybody’s Magazine (Apr., 1919), p. 111 [ref. to U.S. 308th Inf., 77th Div., 1918] :

“Our numerical shortage reminded me of the song we had adopted from the British while we were brigaded with them as reserves behind Arras in the early days:
        
        We started with fifty-odd non-coms and men,
        We started with fifty and now we are ten!        
        And if this bloody war doesn’t end pretty soon,
        There’ll be nobody left in the ruddy platoon!
                Cheerio! Cheerio!
        There’ll be nobody left in the ruddy platoon.

“Our boys thought it smart and veteranish to sing it. But when, months later, we had been reduced to twenty-five per cent. our original size, there was no singing.”