1956.
They supported Diem and Diem wouldn't win the elections because they weren't free. Ho would better win the support of the Vietnamese peasants(they knew him as Uncle Ho etc.)
Diem stated that elections would not being entirely free from communist influence, as the south had not been party to the 1954 Geneva peace agreements.
Peter Diem has written: 'Zeit zur Reform' -- subject(s): Austria, Legislative bodies, Political parties, Elections
Diem cancelled it under the pretext that North Vietnam's communist government wouldn't keep the elections democratic; however another reason was that Ho Chi Minh was more popular than Diem and would have won the reunification election.
Ho Chi Minh had a "handle" on that program, he wasn't worried about it. It was Diem of South Vietnam who refused the elections...saying the communists might win it (something to the effect that they were fixed).
Diem was assassinated in 1963 (the same year that Kennedy was assassinated).
Ngo Dien Diem
Ngo Dinh Diem refused to permit elections to reunify the country. U.S.-supported leaders in the area opposed the elections
South Vietnamese President Diem postponed those elections due to excessive communist influence.
Kennedy and Diem were both assassinated in the same year; 1963.
The per diem amount reported on your W2 form for the tax year is the daily allowance given for work-related expenses.
He was supported from the beginning in 1955, to quote our leadership at the time, "...Diem's the only one we got!"