1) The Beatles started as a skiffle group formed by John Lennon in 1957 and eventually included Paul McCartney, George Harrison, and Ringo Starr.
2) They gained widespread success in the early 1960s with hits like "Love Me Do" and "Please Please Me" and became a highly influential rock band.
3) Internal tensions and personal artistic differences grew between the members over time, especially John Lennon and Paul McCartney, leading to the official breakup of the band in 1970.