There should be some kind of (international) law against this.
They play Scotish bagpipes, Breton binioux (that's like a less tamed
version of the Egyptian howlpipes) and drums.
The ensemble sounds like the first day of the Battle of the Somme. They
start playing, go over the top, and the survivors battle their way into
the trenches of the opposing band. The fallen get their names on the war
memorial.
The whole thing is called something like a Fes Noz.
We have a duty to send in peacekeepers to perevent any repetition of
this.