The Beatles split up in 1970, after making the world a richer place, and making tunes that never die, but the legal ramifications took years before The Beatles were legally split in 1975, but they were still part of 70s music.
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The last Beatles album "Let it be" in 1970, included the tracks "Get back" a hit again in the 1970s and the "Long and winding road" the next album was The Beatles 1962-1966.
Here is a hit single from 1970 "The Beatles" and "Let It Be". Paul McCartney was inspired to write the song, whilst reflecting on the death of his mother when he was aged just fourteen.