A lot of folks tried their teeth on War Pigs, from Bathory to (gasp!) Cat Power to the guy in the bedroom across your wall. There are many great takes on the song out there, and many dreadful versions as well. Why not share some? This is by far my favourite: although very minimalistic in the approach, it manages to convey the cold-heartedness, the alienated cruelty of "The Generals" and the madness of war.
Another one that comes with Tony Iommi's seal of approval, nonetheless: