Mickey Mouse in Vietnam (Previously-Lost Silent Animated Short; 1968)

In 1969, an underground, anti-war short film was produced by Lee Savage and Milton Glaser called "Mickey Mouse in Vietnam". The short (unofficially) starred Mickey Mouse in a 90 second animation that depicted the Disney icon travelling to Vietnam in a boat, entering the country, and being immediately shot in the head. The film was shown to associates of the creators in 1970 and onward.

The only known copy available for public viewing is owned by the Sarajevo Film Festival, although the last time it was played there was in 2010.

3 pages from a 1998 French book entitled 'Bon Anniversaire, Mickey!', and a single, larger-resolution screenshot are the only physical online evidence of the short.

It's likely that copyright issues are the reason it has not been made more publicly available.