Revolver (Beatles album) group collective since 1962, and gave them an unprecedented amount of time to prepare for a new album. Writing in "The Beatles Forever", Nicholas Schaffner cites 1966 as the start of the band's "'psychedelic' period" and adds: "That adjective implies not only the influence of certain mind-altering chemicals, but also the freewheeling spectrum of wide-ranging colors that their new music seemed to evoke." Music journalist Carol Clerk describes "Revolver" as having been "decisively informed by acid", following John Lennon and George Harrison's continued experimentation with the drug LSD since the spring of 1965.<ref name="Clerk/Uncut"> Available at Rock's Backpages (subscription required).</ref>
The Beatles' 1966 tour of Germany, Japan and the Philippines The Beatles' 1966 tour of Germany, Japan and the Philippines The English rock group the Beatles toured Germany, Japan and the Philippines between 24 June and 4 July 1966. The thirteen concerts comprised the first stage of a world tour that ended with the band's final tour of the United States, in August 1966. The shows in what was then West Germany represented a return to the country where the Beatles had developed as a group before achieving fame in 1963. The return flight from the Philippines to England included a stopover in Delhi in India. There, the Beatles indulged