1. Disney produced early animated films in the 1920s-1930s by inventing sound effects using percussion instruments and complex machines within the studio, since recording equipment was too large to take outside.
2. Their first animated film was Alice in Cartoonland in 1923, which was a surprise hit and led them to produce mostly Alice films for the next four years.
3. Marvel Comics was founded in 1939 and introduced many superhero characters during the 1940s "Golden Age", most notably Captain America in 1941, to capitalize on the popularity of comic books and superheroes.