 On 7 September 1964, Johnson assembled his national security team to seek a consensus about what to do about Vietnam.Rusk advised caution, arguing that Johnson should embark on military measures only after diplomacy had been exhausted.In September 1964, Rusk grew frustrated with the endless infighting amongst South Vietnam's junta of generals and after a failed coup d'etat against Nguyễn Khánh sent a message to Maxwell Taylor, the ambassador in Saigon, on 14 September stating he was to "make it emphatically clear" to Khánh and the rest of the junta that Johnson was tired of the infighting.