During the final two years of the Beatles, Lennon and Ono created and attended public protests against the Vietnam War.
On March 20, 1969, they were married at the registry office in Gibraltar and spent their honeymoon in Amsterdam, campaigning with a week-long Bed-In for Peace.
They planned another Bed-In in the US, but were denied entry to the country.
They held one instead at the Queen Elizabeth Hotel in Montreal, where they recorded "Give Peace a Chance".

Lennon later stated his regrets about feeling "guilty enough to give McCartney credit as co-writer on my first independent single instead of giving it to Yoko, who had actually written it with me."
The couple often combined advocacy with performance art, such as in "bagism", first introduced during a Vienna press conference, where they satirised prejudice and stereotyping by wearing a bag over their entire bodies.
Lennon detailed this period in the Beatles' song "The Ballad of John and Yoko".

During the Amsterdam Bed In press conference, Yoko also earned controversy in the Jewish community for claiming during the press conference that, "If I was a Jewish girl in Hitler’s day, I would approach him and become his girlfriend.
After 10 days in bed, he would come to my way of thinking.
This world needs communication.
And making love is a great way of communicating."
It was acknowledged that some Nazis, including Nazi "First Lady" Magda Goebbels, had Jewish lovers at one point in their lives.

Lennon changed his name by deed poll on April 22, 1969, switching out Winston for Ono as a middle name.
Although he used the name John Ono Lennon after that, official documents referred to him as John Winston Ono Lennon, since he was not permitted to revoke a name given at birth.
The couple settled at Tittenhurst Park at Sunninghill, Berkshire, in southeast England.
When Ono was injured in a car accident, Lennon arranged for a king-sized bed to be brought to the recording studio as he worked on the Beatles' last recorded album, Abbey Road.

The two artists collaborated on many albums, beginning in 1968 when Lennon was still a Beatle, with Unfinished Music No.1: Two Virgins, an album of experimental musique concrète.
The same year, the couple contributed an experimental piece to The White Album called "Revolution 9".
Also on The White Album, Ono contributed backing vocals on "Birthday", and one line of lead vocals on "The Continuing Story of Bungalow Bill".
The latter marked the only occasion in a Beatles recording in which a woman sings lead vocals.
During the final two years of the Beatles, Lennon and Ono created and attended public protests against the Vietnam War. On March 20, 1969, they were married at the registry office in Gibraltar and spent their honeymoon in Amsterdam, campaigning with a week-long Bed-In for Peace. They planned another Bed-In in the US, but were denied entry to the country. They held one instead at the Queen Elizabeth Hotel in Montreal, where they recorded "Give Peace a Chance".
Lennon later stated his regrets about feeling "guilty enough to give McCartney credit as co-writer on my first independent single instead of giving it to Yoko, who had actually written it with me." The couple often combined advocacy with performance art, such as in "bagism", first introduced during a Vienna press conference, where they satirised prejudice and stereotyping by wearing a bag over their entire bodies. Lennon detailed this period in the Beatles' song "The Ballad of John and Yoko".
During the Amsterdam Bed In press conference, Yoko also earned controversy in the Jewish community for claiming during the press conference that, "If I was a Jewish girl in Hitler’s day, I would approach him and become his girlfriend. After 10 days in bed, he would come to my way of thinking. This world needs communication. And making love is a great way of communicating." It was acknowledged that some Nazis, including Nazi "First Lady" Magda Goebbels, had Jewish lovers at one point in their lives.
Lennon changed his name by deed poll on April 22, 1969, switching out Winston for Ono as a middle name. Although he used the name John Ono Lennon after that, official documents referred to him as John Winston Ono Lennon, since he was not permitted to revoke a name given at birth. The couple settled at Tittenhurst Park at Sunninghill, Berkshire, in southeast England. When Ono was injured in a car accident, Lennon arranged for a king-sized bed to be brought to the recording studio as he worked on the Beatles' last recorded album, Abbey Road.
The two artists collaborated on many albums, beginning in 1968 when Lennon was still a Beatle, with Unfinished Music No.1: Two Virgins, an album of experimental musique concrète. The same year, the couple contributed an experimental piece to The White Album called "Revolution 9". Also on The White Album, Ono contributed backing vocals on "Birthday", and one line of lead vocals on "The Continuing Story of Bungalow Bill". The latter marked the only occasion in a Beatles recording in which a woman sings lead vocals.
Yoko Ono