"On Being Asked to Write a Poem Against the War in Vietnam" by Hayden Carruth.

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.