How far was USA's involvement guilty for the expansion of communism in South-East Asia?

Question

I think it has something to do with the Domino Theory.
Answer pleaseee!.

Answer 1

Guilty implies responsibility. I don't think US involvement caused communism. I also do not think that US involvement did much to hinder it.

The Domino Theory was a theory that said if Vietnam was allowed to become communist the other South East Asian states, such as Thailand, Malaysia, Laos and Kampuchea would also become communist, toppling like a row of dominoes.