 The tour in part supported the group's "Exile on Main St." album, which was released a few weeks earlier on 12 May.It was also part of a tour-America-every-three-years rotation that the group established in 1969 and maintained through 1981.On the first show of the tour, 3 June in Vancouver, British Columbia, 31 policemen were treated for injuries when more than 2,000 fans attempted to crash the Pacific Coliseum.