They bled once, but for those who feel the loss most deeply, the tears never end. And who feels the loss? We all should, really, because we all lost someone to war, whether we know it or not.
My son and I were riding home from a Boy Scout campout many years ago with another Scout and his father, who was driving.. I don't know how the conversation got to the Vietnam War, but at one point I remarked that we all lost someone in that conflict. The other Scout wondered how he could have lost someone in a war that was over long before he was born.
I told him that there could have been someone in his life – a friend, a teacher, a sweetheart – someone very important, but that person's father now has his name on a black stone wall in Washington, DC. So it is at least possible – maybe likely – that he really did lose someone in that war.
And the same thing is true regarding all the wars we have fought, and are now fighting. We all lose someone in them, whether we know it or not.
So send not to know for whom the bell tolls. It tolls for thee.