The Vietnam War was a Cold War-era conflict that began in 1955 and lasted until 1975. It was fought between communist North Vietnam, supported by its allies, and the non-communist South Vietnam, supported by the United States and other anti-communist nations. The war began as a struggle between the Communist Party of Vietnam (CPV) and the Vietnamese National Army (VNA) for control of the country. The VNA was supported by the United States and South Vietnam's other allies, while the CPV was supported by the Soviet Union, China, and North Vietnam's other allies. The war escalated into a full-scale conflict in 1965 when the United States began sending troops to South Vietnam to support the VNA. The United States increased its military involvement in the war over the next decade but was unable to achieve victory. The war ended in 1975 with a Communist victory and the unification of Vietnam under the CPV. 

The Vietnam War was a conflict between Communist-backed North Vietnam and U.S.-supported South Vietnam. The war began in Vietnam in 1959 but did not really escalate until 1965 when the U.S. began to send large numbers of troops to South Vietnam.

So why did South Vietnam want communism? 

1. The primary reason that South Vietnam wanted communism was because they were being supported by the Soviet Union and China. These two countries were the main backers of North Vietnam, and they were providing them with military aid and supplies. South Vietnam saw communism as a way to get out from under the domination of these two countries.
2. Another reason that South Vietnam wanted communism was that they felt that it would bring about social and economic justice. The South Vietnamese government was corrupt and unfair, and many people felt that communism would be a way to change that.
3. Thirdly, many people in South Vietnam were tired of the corruption and violence that was rampant in their country and saw communism as a way to create a more just and peaceful society.
4. Forth, many people in South Vietnam were poor and saw communism as a way to improve their economic situation.
5. Fifth, communism promised equality for all people, something that was very appealing to many people who were living in an unjust society. 
6. Finally, South Vietnam also saw communism as a way to unite the country. North and South Vietnam had been divided for many years, and South Vietnam saw communism as a way to finally unify the country and end the division.

However, it is worth noting that not everyone in South Vietnam wanted communism. There was a significant anti-communist movement in the country, which was supported by the United States and South Vietnam's other allies. The Vietnam War was a complex conflict, and there are a variety of factors that contributed to its outbreak. However, the desire for communism may have been one of the key reasons why South Vietnam aligned itself with the CPV.