Mickey Mouse universe
In "Plane Crazy" (1929), the first produced Mickey Mouse story, Mickey is seen at a farm. In all of his early films Mickey is in a rural setting, but most commonly at a farm. This setting was succinctly presented in the first sentences of one of Mickey's first storybooks:
Giantland
The film was the first animated appearance of Mickey's nephews, although they had appeared in comics in 1932, in Floyd Gottfredson's Mickey Mouse Sunday strip titled "Mickey's Nephews".