How effectively did USA contain the spread of Communism - Vietnam

Why did the USA become involved with Vietnam?

Worries about the Domino effect (one country falling could trigger more countries to fall to communism)
Thought it would help election since US people were in favour of a tough approach
Pressure from big businesses as they would benefit from war
Containment policy

How was US involvement under Eisenhower?

In 1955, USA supported establishment of Diem’s South Vietnam (corrupt and anti-communist)
Diem’s regime received $1.6 billion in financial support in 1950s
1957 - Viet Cong began waging guerrilla war against South Vietnamese regime, supported by North Vietnam
USA sent military advisors to support and train South Vietnam army

How was US involvement under Kennedy?

Increased no. of military advisors from 11500 (1962) to 23000 (1964)
Began Stratefic hamlets program, fortifying villages against attack
Scheme affected by corruption and unpopularity

How was US involvement under Johnson

1964 - North Vietnamese patrol boats fired upon USA warships in Gulf of Tonkin
Johnson used the incident as an excuse to launch a full-scale war
In 1965, the US launched “Operation Rolling Thunder”, a massive bombing offensive against North Vietnam
The first combat troops (not advisers) also landed in Vietnam in 1965

What are some examples of the Viet Congs guerrilla tactics?

No uniforms, no clear supply bases or headquarters, Booby traps and mines, supporting local population, attacking at close range.

Why did the Viet Cong use these tactics?

The VC and their allies the ARVN were outnumbered and outdated
The tactics were proved to be successful
They maximised their advantages - e.g. morale, willingniss to take causualties, knowledge of language, cuture and terrain

Why were Viet Cong Tactics effective?

Minimised American advantages like equipment
Wore down American morale (constant fear of attack)
Viet Cong morale was high, willing to have casualties to win