The listing of 'Steamboat Willie', prompted me to start this thread.
When I first got into film collecting I made sure of getting a few film milestones that I had read about as a boy. The ones that come to mind in my collection are:-
Walt Disney's 'The Three Little Pigs'. This was the first cartoon in 3 strip Technicolor. Unfortunately, the Walt Disney company released this in B&W and silent.
The Great Train Robbery, made in 1902, was famous for the close up at the end, the cowboy fires a gun at the audience, and many of them ducked at the time. Although a Western, it was actually shot in the Eastern part of the USA.
Gertie the Dinosaur, the first cartoon, made in 1909.
A Rough Sea at Dover, made in 1895, it was the first public screening of a film in Britain.
Also have George Melies 'a Trip to the Moon' (1902), not sure if this is classed as a Milestone, though it appears in many books on the history of the cinema.

What other milestones were released in Super or Standard 8?

Robert, https://en.wikipedia.org/wiki/Flowers_and_Trees, was the first Technicolor full-color three-strip release. ( I have it on Super 8 ). Also Disney, but not as famous as the blockbuster Three Little Pigs. ( I have a WDHM print in colour, that have been striped and recorded, by the former owner )
One other milestone to remember is the first animated feature: Snow White and the Seven Dwarfs. I was lucky to find a print in Blackpool last year. One of my all time favourites.

Thanks Mats, so the Three Little Pigs wasn't the first. That was quite a find. I don't know if 'Becky Sharpe' was ever released in Super 8, but that was the first feature to completely use 3 strip Technicolor.

To be honest, I have never heard of Becky Sharpe. But if it was the first, it must be counted as a milestone.

Mats, do you have 'Song of the South'?

No, but I think that Vidar bought a 16 mm print about two years ago. I only have the WDHM 200ft Brer Rabbit and the Tar Baby.