John Paul Vann became an adviser to the Saigon regime in the early 1960s. He was an ardent critic of how the war was fought, both on the part of the Saigon regime, which he viewed as corrupt and incompetent, and, as time went by, increasingly, on the part of the U.S. military. In particular, he was critical of the U.S. military command, especially under William Westmoreland, and its inability to adapt to the fact that it was facing a popular guerrilla movement while backing a corrupt regime. He argued that many of the tactics employed (for example the strategic hamlet relocation) further alienated the population and thus were counterproductive to U.S. objectives. He was often unable to influence the military command but used the Saigon press corps including Sheehan, David Halberstam and Malcolm Browne to disseminate his views.