Help me find a Christmas SPecial of sorts?

Question

This was a special, it aired in the late 1980's. It started with a young rodent asking his grandfather how they got the house. The Grandfather proceeded to tell him a story. There were two human armies, they had WWII type bombers, but worse WWI uniforms with gasmasks. You saw none of their faces. One side was the Vegetarians the other the Meat Eaters. The fought each other until only two guys were left. One was wounded and he shot the other human, and then slid to his own death into a bomb crater full of water.
The grandfather said that is how we got our houses, and it zoomed out and there was a village of human helmets that had been turned into houses.

Please help!

Answer 1

This isn't a special...this sounds like a pre-World War II MGM cartoon short called "Peace on Earth" (1939;dir. Hugh Harman). TCM's Ben Mankiewicz and the New York Times (in Harman's 1982 obituary) claim that this cartoon was nominated for the Nobel Peace Prize thiough no official documentation exists.

From the Wikipedia entry on this cartoon:
"The plot revolves around two young animals, in this case squirrels, asking their grandfather on Christmas Eve what the "men" are in the lyric "Peace on Earth, good will to men." The grandfather squirrel then tells them a rotoscoped history of the human race, focusing on the neverending wars men waged. But ultimately the wars do end, with the death of the last man on Earth, a soldier."

William Hanna and Joseph Barbera (then working for MGM's cartoon studio) remade this in Cinemascope in 1955 as "Good Will to Men".

Both versions were Oscar nominees for Best Short Subject.