How is Stalin's power struggle with Trotsky shown in Animal Farm?

Animal Farm is a satire of totalitarian governments in their many guises. But Orwell composed the book for a more specific purpose: to serve as a cautionary tale about Stalinism. It was for this reason that he faced such difficulty in getting the book published; by the time Animal Farm was ready to meet its readers, the Allies were cooperating with the Soviet Union. The allegorical characters of the novel represent specific historical figures and different factions of Imperial Russian and Soviet society. These include Karl Marx (Major), Vladimir Lenin (Major), Leon Trotsky (Snowball), Joseph Stalin (Napoleon), Adolf Hitler (Frederick), the Allies (Pilkington), the peasants (Boxer), the elite (Mollie), and the church (Moses).

The resemblance of some of the novel’s events to events in Soviet history is indubitable. For example, Snowball’s and Napoleon’s power struggle is a direct allegory of Trotsky’s and Stalin’s. Frederick’s trade agreement with Napoleon, and his subsequent breaking of the agreement, represents the Nazi-Soviet non-aggression pact that preceded World War II. The following Battle of the Windmill represents World War II itself.

Despite his fairy-tale clarity in satirizing some historical events, Orwell is less specific about others. For example, the executions in Chapter VII conflate the Red Terror with the Great Purge. The executions themselves bear resemblance to both events, although their details connect them more to the Moscow Trials than to the Red Terror. Squealer’s subsequent announcement that the executions have ended the Rebellion connects them to the period of the Red Terror, however. Orwell leaves some ambiguity in the identities of the Rebellion and the Battle of the Cowshed. These ambiguities help the reader focus on the overall satire of Stalinism and the broader warning about the evils of totalitarian government.