Please answer the following question: Given the below context:  The four officers were taken aback by Taylor's searing words and felt they had been humiliated. A decade after the incident, Kỳ described Taylor as "the sort of man who addressed people rather than talked to them", referencing the confrontation. Karnow said "For the sake of their own pride, they [the Vietnamese officers] resented being treated in ways that reminded them of their almost total dependence on an alien power. How could they preserve a sense of sovereignty when Taylor, striving to push them into 'getting things done', behaved like a viceroy?" However, Thi also took a perverse pleasure in riling Taylor. He was seen by a CIA officer soon after, grinning. When asked why he was happy, Thi said "Because this is one of the happiest days of my life ... Today I told the American ambassador that he could not dictate to us." Nevertheless, Taylor's conduct had rankled the officers, stirring their latent sense of nationalism and anti-Americanism; Khánh would exploit this to strengthen his fragile position in the junta.Khánh's quartet of delegates responded to Taylor in a circumlocutory way. They remained calm and did not resort to direct confrontation. Kỳ said the change was necessary, as "the political situation is worse than it ever was under Diệm". Kỳ explained that the situation mandated the dissolution of the council, saying "We know you want stability, but you cannot have stability until you have Unity." He claimed some HNC members were disseminating coup rumors and creating doubt among the population, and that "both military and civilian leaders regard the presence of these people in the High National Council as divisive of the Armed Forces due to their influence". Kỳ further accused some of the HNC members of being communist sympathizers and cowards who wanted to stop the military from strengthening. He promised to explain the decision at a media conference and vowed that he and his colleagues would return to purely military roles in the near future. Thiệu added "I do not see how our action has hurt...  Guess a valid title for it!
Answer:
December 1964 South Vietnamese coup