The Ballad of Harry Farr by Huw Pudner is a song about a soldier executed on the Somme in WW1,however the last verse is relevant to the invasion of Iraq.....

"So many years on
All those soldiers have gone
They pardoned young Harry
With a stroke of a pen
But what of the liars
Who send men to the fires?
They are still free
To start wars once again"

from
The Ballad of Harry Farr