McCartney 1968

From May 1960, The Beatles were booked by Allan Williams,[39] to perform at a club in Hamburg. For the next two years, The Beatles remained in Hamburg for much of the time, performing as a resident group in a number of Hamburg clubs. During their two-year Hamburg residency they returned to Liverpool from time to time, performing at the Cavern club. Prior to the end of the residency, Sutcliffe left the band, so McCartney, reluctantly, became The Beatles' bass player. The Beatles recorded their first published musical material in Hamburg, performing as the backing group for Tony Sheridan on the single "My Bonnie". This recording later brought the Beatles to the attention of a key figure in their subsequent development and commercial success, Brian Epstein, who became their next manager.

souce:http://en.wikipedia.org