This theory was the driving force behind the kennedy administration’s actions in vietnam. what was it?

During President Dwight Eisenhower's administration, he came up with the Domino Theory which said that if one nation in the Pacific falls to Communism, so will the rest of Southeast Asia. President John Kennedy agreed with this theory which led to the major actions that he took against the Vietnamese in the early 1960's. 

The correct answer is The Domino Theory. This theory was the driving force behind the Kennedy administration’s actions in Vietnam. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.