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 were "glad to have done what we did … We must have been the only people who'd ever dared to snub Marcos." As of 2016, none of the former Beatles had ever returned to the Philippines, despite an attempt by Filipino musician Ely Buendia – in response to the promotional campaign for Starr's 2015 album "Postcards from Paradise" – to lure Starr back to the country. According to Walter Everett (lead singers appear in parenthesis): According to Barry Miles and Walter Everett: The Beatles' 1966 tour of Germany, Japan and the Philippines The English rock group the Beatles toured Germany,