September 1963: while Paul and Ringo vacationed in Greece, and John and Cynthia had a belated honeymoon in Paris, George was the first Beatle to visit the U.S.A. when he and his brother Peter spent a couple of weeks with their niece Leslie and sister Louise in Benton, Illinois.
Here's the story about that trip...
https://www.smithsonianmag.com/.../charming-story-george.../