In this episode Mojo & Myra discuss how the original title of "War Pigs" was Walpurgis, dealing with the witches' sabbath."

 Walpurgis is sort of like Christmas for Satanists. And to me, war was the big Satan", said bassist and lyricist Geezer Butler. "It wasn’t about politics or government or anything. It was Evil itself. So I was saying 'generals gathered in the masses / just like witches at black masses' to make an analogy. But when we brought it to the record company, they thought 'Walpurgis' sounded too Satanic. And that's when we turned it into 'War Pigs'. But we didn't change the lyrics, because they were already finished."

During this time period, mandatory army service had recently ended in Britain but with the Vietnam War raging, many young men feared they'd be conscripted to fight in it. "That's what started this whole rebellion thing about not going to war for anybody", said Butler. "I was dreading being called up", the lyricist recalled. Butler’s mood had changed by the time the album was being recorded. In “War Pigs”, the generals — dubbed “the real Satanists” by the bassist — and warmongering politicians who use the poor as chess pieces became the focal point of the story. Satan was kept on as the architect of the carnage (he escapes) as the war pigs face judgment day.