Conversation so far:
Are there any other interesting aspects about this article?
The Beatles' impact on the US was particularly strong, where a garage rock phenomenon had already begun.
How did they influence them?
The movement received a major lift following the group's historic appearance on The Ed Sullivan Show.
did they appear anywhere else?
CANNOTANSWER.
Was there any notable songs?
a garage rock phenomenon had already begun, with hits such as "Louie Louie" by the Kingsmen.

Question: What impact did they have?
Self-contained rewrite: What impact did the Beatles have on culture?