Ike had already sent advisors there.
Don’t confuse having some advisers there with creating JFK’s Vietnam War.
The US Army had been involved in Vietnam since FDR and the 1940s with no intention of becoming engaged in an American war there, we have advisers and Army Special Forces all over the globe and in war zones today, that has nothing to do with sending in 16,000 troops as JFK did, and Nixon would not have done.