"Large, rather fierce-looking Berkshire boar, not much of a talker, but with a reputation for getting his own way."  Napoleon's characters parallels and portrays Joseph Stalin, which is especially seen in the examples of mass executions, like those of Stalin in the 1930's. Also he exiles Snowball, "aka" Trotsky and bestows three titles upon himself, just like Stalin. The pact was signed with Frederick and the farm's industrialization, which Stalin began in 1929, though it was Trotsky's (Snowball's) idea.