Here's a sanitized Brit/Canadian army version!

Old King Cole was a merry old soul
And a merry old soul was he
He called for his pipe & he called for his bowl
And he called for his First CG
         [Corps of Guards?   or Coldstream Guards ? ...]

"What's the next command" said the Major
"I want 6 months leave" said the Captain
"We do all the work" said the Subalterns
      ?   ?          said the Sergeant Major
'Move to the Right in Fours" said the Sergeant
"Left Right Left Right Left" said the Corporal
"We want jam for tea" said the Guardsmen

Merry, merry men are We
There are none so fair as can compare
With the Men of the First C G.