After the coup, Đính became one of the 12 members of the Military Revolutionary Council (MRC), but this lasted only three months before a bloodless coup by General Nguyễn Khánh. Đính and his colleagues were put under house arrest by Khánh and falsely accused of promoting a neutralist plot. The subsequent military trial collapsed. The generals were convicted of "lax morality", but were eventually allowed to resume their military service, albeit in meaningless desk jobs. Following Khánh's exile by another group of generals, Đính was appointed to command the I Corps in 1966 and ordered to put down the Buddhist Uprising, but Prime Minister Nguyễn Cao Kỳ disapproved of his conciliatory policies. Kỳ launched a successful surprise attack against Đính, who fled, but was later captured and briefly imprisoned by Kỳ. After his release, Đính worked in the media and was elected to the Senate in 1967. He served in the upper house until the fall of Saigon in April 1975, when he fled Vietnam.