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:
The Magic Kingdom: Walt Disney and the American Way of Life
Walt Disney was born in Chicago on December 5, 1901 and lived in Marceline, Missouri from 1905 to 1910. When he was young, he had a talent for drawing and he earned money doing illustrations for newspapers and advertisements. He left home in 1919 and worked at a commercial art studio in Kansas City, after he was fired from the studio, he started his own shop in 1920. Soon, Walt worked at the Kansas City Film Ad Co. which was his first direct employment in animation. In 1922, he started Laugh-O-Gram Films until he went bankrupt. In 1923, he went to Hollywood and started a Los Angeles studio called Disney.
And on that train ride from Manhattan to Los Angeles, Mickey Mouse was born.