Education
In 1950, he graduated from Military school in Huế. He then attended College of Tactics and graduated in Hanoi in 1952. He went to the United States and attended Command and General Staff College and he graduated in 1958.
In 1950, he graduated from Military school in Huế. He then attended College of Tactics and graduated in Hanoi in 1952. He went to the United States and attended Command and General Staff College and he graduated in 1958.
He was the commander of the Army of the Republic of Vietnam (ARVN) 7th Division. He worked with Lieutenant Colonel John Paul Vann, most notably during the Battle of Ap Bac. He served as Senate First Vice President in the government of South Vietnam.
After the Fall of Saigon, he was left behind in South Vietnam and imprisoned until 1987.
He came to the United States in 1990. He was a contributing writer for the Vietnam Magazine and the author of Vietnam: Today & Tomorrow.
Military positions
Platoon Leader, 1950-1951
Company commander, 1951-1952
Battalion commander, 1953-1954
Chief of the Special Staff, Presidency 1955-1957
Commander, 13th Infantry Division, 1957-1958
Commander, 7th Infantry Division and Tien Giang Tactical Zone, 1959-1962
Chief negotiator, Vietnamese Delegation to Meeting with Cambodian Delegation on Vietnam-Cambodia Borders, March 1964
General commissioner, Popular Complaints and Suggestions Office, 4 May 1964
Chief, General Political Warfare Department, 1965-1966
Commanding General, First Corps, 16–30 May 1966
Political career
Chairman, Social Democrat Bloc, Senate, 1967–1968
Chairman, foreign Affairs and Information Committee, Senate, 1968
First Deputy Chairman, Senate, 1970–1971
Senator, 1971–1975
Decorations and awards.