One of my best rock albums is 'Black Sabbath Greatest Hits '70 to '78'. But I don't suppose fans notice that the song 'War Pigs' studio version is different than when they play the song live. That is because the guitar in the studio version is layered or mixed (something like that) that they can't do Live. And I love the studio version and will usually skip over a live version.
The earliest versions of the song that I've heard is Black Sabbath in Paris 1970. Ozzy either forgot the words or they hadn't completed the lyrics for the song when they played it. IMO the lyrics for the song had not been finalized at that time.
I know this song was popular back in the day as I recall a car load of men playing the song full blast as they drove by.
