During World War II, in which he was rejected for military service, he was associated with the left wing of the British Labour party, but didn't much sympathise with their views, for even their reckless version of socialism seemed too well organised for him. He wasn't much affected, apparently, by the Nazi brand of totalitarianism, for there was no room within him except for his private war with Stalinist communism. Consequently, when Great Britain was fighting for its life against Nazism, and the Soviet Union fought as an ally in the struggle and contributed rather more than its share in lives lost and in resolute courage, Orwell wrote Animal Farm which was a satire of the Russian Revolution and what followed, picturing it in terms of a revolt of barnyard animals against human masters. He completed Animal Farm in 1944 and had trouble finding a publisher since it wasn't a particularly good time for upsetting the Soviets. As soon as the war came to an end, however, the Soviet Union was fair game and Animal Farm was published. It was greeted with much acclaim and Orwell became sufficiently prosperous to retire and devote himself to his masterpiece, 1984.

I did not know it was finished in 1944, that is wild, no wonder it's taught in American schools.