Well I have and in fact 
more than one and I'll 
tell you this too 
 
I wrote one against 
Algeria that nightmare 
and another against 
 
Korea and another 
against the one 
I was in 
 
and I don't remember 
how many against 
the three 
 
when I was a boy 
Abyssinia Spain and 
Harlan County 
 
and not one 
breath was restored 
to one 
 
shattered throat 
mans womans or childs 
not one not 
 
one 
but death went on and on 
never looking aside 
 
except now and then 
with a furtive half-smile 
to make sure I was noticing.
Hayden Carruth
http://www.poemhunter.com/poem/on-being-asked-to-write-a-poem-against-the-war-i/