“Sky Pilot” by the Animals.
On the side of a hill, in a land called Somewhere / A little boy lies asleep in the earth / While down in the valley, a cruel war rages / And people forget what a child’s life is worth
Paul Simon
“The Unknown Soldier” - The Doors
I grew up in the early to mid 60’s in the USA.
When I first saw this post, my immediate thought was Buffalo Springfield and the song “For What It’s Worth”.
Kent State shocked and alarmed us kids at the time.
Anyway, a link below to Monterrey, with an intro by Peter Tork of the Monkees, of which thread here I just finished reading lol.
Great sing, with a great parody, “Garnet’s Homemade Beer,” here http://youtu.be/Igx_Lo0_1GI
Stan Rogers wrote the original. Garnet is his brother.
There is also So Long, Mom (I’m Off to Drop the Bomb)
But my favorite is probably My Name is Lisa Kalveledge
John Fogerty - “It’s Like Deja Vu All Over Again.”
Where Have All the Flowers Gone? www.youtube.com/watch?v=ZgXNVA9ngx8
and Johnny, We Hardly Knew Ya http://www.youtube.com/watch?v=Yg_rf2d894k
are the classic antiwar of my childhood. We have many more. My heart is broken.
And both songs were already mentioned in posts 32 and 34. 
Tom Waits’ song about a young soldier: Day After Tomorrow Joan Baez’s version
Billy, Don’t Be a Hero
But seriously, I agree with quite a few of the previous posts.
“Wooden Ships”.
Hanging on the Old Barbed Wire
For What It’s Worth is not actually an anti-war song.
[QUOTE=Wikipedia]
Though often mistaken for an anti-war song, it was the first of the “Sunset Strip riots” which inspired then Buffalo Springfield band member Stephen Stills to write “For What It’s Worth”, recorded about three weeks after on December 5, 1966.
[/QUOTE]
Pete Seeger is credited with adding the final lines to “Where Have All the Flowers Gone”.
“Waist Deep” is NOT about war - it is a reference to an incident in which a (drunken?) Drill Instructor ordered his fully-loaded troops into the river.
They went, and several died before the mess was over.
“Thresher” was about the USS Thresher - an early nuclear sub (armed) which died when the asshole Commander ordered it to dive below its limit.
Pete really didn’t like things stupid - especially when wrapped in the flag.
Back to Anti-War:
“Cruel War” is another from the US Civil war
“Who’ll Stop the Rain?” was CCR’s addition. "Rain is a common metaphor for war, and the lines:
“'Long as I remember
Rain’s been coming down”
was dead-on.
Remember that it was 1975 before the Boomers knew a country NOT at war. We got the body counts on the 6 o’clock news.
Great childhood memories:
As long as I can remember, this war has been going on.
And back to Paul Simon:
Listen to both tracks on Scarborough Fair / Canticle
usedtobe
No I think “Waist Deep In The Big Muddy” is an anti-war song.
It was written by Pete Seeger in 1967 - a time when the Vietnam War was rapidly gaining its unpopularity.
It became famous (perhaps even infamous?) when Pete Seeger’s performance of it was censored from the Smothers Brothers Show.
Here’s what Wikipedia says about it:
Jimmy Cliff’s “VietNam”
Sam Stone, by John Prine.