<P> Each band member began to develop individual artistic agendas, which eventually compromised the enthusiasm among the musicians . Soon, each band member became impatient with the others . This became most evident on the White Album, in which personal artistic preferences began to dominate the recording sessions, which in turn further undermined the band's unity . </P> <P> Lennon was in a fragile state of mind after returning from the band's sojourn in India in early 1968 . He was disillusioned and resentful that their Transcendental Meditation guru, Maharishi Mahesh Yogi, had not fulfilled his expectations . </P> <P> Coupled with renewed drug use and deterioration in his marriage and family life, Lennon's personal identity and artistic role within the Beatles was a source of discontent . He began to develop an intense interest in the work of Yoko Ono, a Japanese - American conceptual artist whom he had first met at one of her exhibitions in 1966 . The pair maintained a platonic relationship until the spring of 1968 . In May that year, they spent time together in his home studio while his wife, Cynthia, was away on holiday . They recorded an avant - garde tape that would eventually be released as Unfinished Music No. 1: Two Virgins, before consummating their new relationship . From that point on, the two were almost always together, even as Lennon was working with the rest of the band in the studio . This violated a previous tacit agreement between the members not to let wives or girlfriends into the studio . </P> <P> In addition, as Lennon's artistic infatuation with Ono grew, he desired that she would be allotted artistic input into the band's recordings . Frequently, Ono would comment or make suggestions in the recording studio, which only served to increase the friction between her and Lennon's bandmates . Ono's intrusive presence was a source of rancour to Harrison, in particular, after his and Lennon's shared experimentation with LSD and Indian spirituality--two experiences that McCartney had approached with a level of caution--had united the pair since 1965 . </P>

When did the beatles start and break up