During John Kerry's candidacy in the 2004 U.S. presidential campaign, a political issue that gained widespread public attention was Kerry's Vietnam War record. In television advertisements and a book called Unfit for Command, co-authored by John O'Neill and Jerome Corsi, the Swift Boat Veterans for Truth (SBVT), a 527 group later known as the Swift Vets and POWs for Truth, questioned details of his military service record and circumstances relating to the award of his combat medals. Their campaign against Kerry's presidential bid received widespread publicity, but was later discredited and gave rise to the neologism "swiftboating", to describe an unfair or untrue political attack. Defenders of John Kerry's service record, including nearly all of his former crewmates, have stated that SBVT's allegations are false.
Several members of Swift Boat Veterans for Truth (SBVT) served in the same unit as Kerry and one, Stephen Gardner, served as a crewmember on Kerry's boat. A number of Kerry's SBVT critics were present on accompanying Swift Boats at one of the combat events for which Kerry was decorated with the Bronze Star Medal and a third Purple Heart. Another SBVT member, Dr. Louis Letson, was the physician who claims to have treated Kerry for his first Purple Heart wound. Larry Clayton Lee was the sole SBVT member to participate in the event for which Kerry was awarded the Silver Star. No SBVT member participated in events related to the award of Kerry's second Purple Heart.
In addition to questioning the merit of many of Kerry's service awards, SBVT decried his post-Vietnam anti-war activity and disputed the truthfulness of his subsequent testimony about the conduct of the American military as demonstrated in that war. Many political observers saw this as reflecting the "true reason behind the Swift Boat campaign." All of the allegations referencing Kerry's Vietnam service and awards were made during Kerry's 2004 presidential campaign while Kerry's post-Vietnam anti-war activity had long been a subject of controversy.