They were with Black Sabbath on that tour and from what Ozzy has said, Van Halen absolutely blew them off the stage. Said it was embarrassing, VH should've been the headliner.
The Ozzy era of Sabbath was on life support on that tour. Ozzy had left in '77 and was replaced by Dave Walker. He came back for the ill fated "Never Say Die" album and that '78 tour, their 10th Anniversary. Bill Ward was in a bad way with the booze and Iommi and Butler were tired of the bullshit. They were definitely not at the top of their game. Dio came in a year later and took them to a whole new realm.
