What does the windmill in animal farm in animal farm

In Animal Farm, the characters and events are an allegory, or symbol, of what is happening in the Soviet Union during that time period. Snowball represents Leon Trotsky, who believed in promoting technology and spreading communism. Napoleon represents Joseph Stalin, who believed in building a strong army.

Cue Josef Stalin (Napoleon) and Leon Trotsky (Snowball) both waving their hands around in the air and shouting "Pick me! ... After Lenin died, Trotsky was exiled. By 1928, Russia was Stalin's. In Animal Farm, this whole kerfuffle is represented by the argument over the windmill.