Chorus, after the "Beer Beer Beer..." part:
Fighting (or Merry) men are we..
There are none so fair that they can compare
to the Field Artillery (can be changed..
)
Here's the rest of the ranks (as far as I can remember)
Start a war (or "Nuke them all"), said the Generals
Who's gonna shine my boots (or "When can I play golf?"), said the Colonels
Who's gonna drive my Jeep (or "I need a bigger desk!"), said the Majors
Take that hill, said the Captains
What should I do next, said the Looies
Left right left, said the sergeants
There are also many other versions of it out there...