Make reeds - not war!
Suspect, a very good occupation to devote yourself to.
found here
And here I thought making reeds was war.
“Make War, Not Reeds!” might be a more peaceful slogan. 
There was a radio interview with Neillidh Mulligan where he said he found reed making very therapeutic!
maybe until the final scraping…
Tommy
a piper failed to make the twelfth reed, fell in rage and went to war (or declared the war)
- this is how this reversed slogan might have appeared