More symbolism in Animal Farm

At first, it seemed that the revolution in Animal Farm could have been any revolution that instituted a communist government (assuming you skipped the introduction of course). Perhaps Orwell was saying that the processes that allowed totalitarian rulers to take power were universal, and tended to happen in any revolution. However, when you closely examine the events of the Russian revolution, you begin to see the symbolism within Animal Farm. Old major, the boar who instigated the revolution, seems to represent Lenin. The farmers in the book represent the former government of Russia, corrupt and oppressive. Additionally, they later seem to represent the Nazis who invaded Russia during WWII.