May 31, 2011
"The song was written during Lennon’s ‘Bed-In’ honeymoon: when asked by a reporter what he was trying to achieve by staying in bed, Lennon answered spontaneously “All we are saying is give peace a chance”; He sang the song several times during the Bed-In. Finally, on 1 June 1969, in Room 1742 at the Queen Elizabeth Hotel in Montreal, André Perry recorded it using a simple setup of four microphones and a four-track tape recorder rented from a local recording studio. The recording session was attended by dozens of journalists and various celebrities, including Timothy Leary, Rabbi Abraham Feinberg, Joseph Schwartz, Allan Rock, Rosemary Woodruff Leary, Petula Clark, Dick Gregory, Allen Ginsberg, Murray the K and Derek Taylor, many of whom are mentioned in the lyrics. Lennon played acoustic guitar and was joined by Tommy Smothers of the Smothers Brothers, also on acoustic guitar. "
( courtesy of http://www.worldwidehippies.com/ my absolute favorite blog for politics and nostalgia)