Homage to Catalonia by George Orwell

I believe that with Catalonia (and Spain) George Orwell actually meant Russia not Spain and himself not as an English man but as a German and it happened while he was a German citizen which means before he settled in the UK. I don't know about world war histories that much but again I know Russia and Russians therefore I have no doubt that George Orwell actually describes Russians rather than Catalonians in Homage to Catalonia.