In case you didn’t know, this was the poem broadcast on Radio Londres as a code to French Resistance that D-Day was happening.
One of my favourite pastimes is making up phrases that might have been used as codes on the radio:
Jacques’ cow will NOT GIVE MILK.
Marcel has a VERY FINE MOUSTACHE.
The baker has BURNT THE BAGUETTES.
It works for almost anything as long as you shout out the last three words slowly. See? A fun game for long car journeys, or perhaps when speaking to someone really boring.