Paul McCartney has had a long and successful solo career after leaving The Beatles. For a short time, McCartney was backed by the band Wings. The former Beatle came up with the name Wings following a traumatic and impactful life event. The Beatles dominated the 1960s, but the band would only have a decade of success before splitting up in 1970. Each member was going off on their own solo careers, and Paul McCartney was set to debut his first solo album only weeks before The Beatles’ final album, Let it Be. According to Billboard, McCartney was given a letter from John Lennon, Ringo Starr, and George Harrison, asking him to push the album until after Let it Be debuted.
Source: Ross Tanenbaum/cheatsheet.com