See: his memoir "Homage to Catalonia," wherein he worked with the Communist Party of Great Britain to get him into Spain during the Spanish Civil War, where he fought with the POUM, a Spanish anti-Stalinist communist party (though he would admit that this was mostly by chance, and he himself was more aligned with the anarchists).
He would say later, "Every line of serious work that I have written since 1936 has been written, directly or indirectly, against totalitarianism and for democratic socialism, as I understand it." (https://www.orwellfoundation.com/the-orwell-foundation/orwel...)
He would say later, "Every line of serious work that I have written since 1936 has been written, directly or indirectly, against totalitarianism and for democratic socialism, as I understand it." (https://www.orwellfoundation.com/the-orwell-foundation/orwel...)