South Vietnam had been bombarded by aircraft for years. North Vietnam was bombed by US jets during the first week of August 1964 in retaliation for their navy's torpedo boat attacks on the destroyers USS Maddox and USS Turner Joy on 2 & 4 August '64; known historicially as the "Tonkin Gulf Incident." The 04 August attack may have been "Tonkin Ghosts."
Because of the Tonkin Gulf Incident in '64. The Tonkin Gulf Incident resulted in open warfare between North VN and the US. US jets began bombing North VN in 1965 (Operation Rolling Thunder), US Infantrmen and Tanks were deployed to RVN (Republic of South Vietnam) to battle North Vietnamese Army troops which had infiltrated into RVN.
The war had transitioned from a guerrilla war fighting only the Viet Cong in RVN to also fighting the NVA (North Viet Army) in RVN, and an air war over North Vietnam, in which the US Air Force and US Navy (air units) were tangling with North Vietnamese Air Force MiG17, MiG19, and MiG21 jet interceptors.
Bottom line: Vietnam went from a guerrilla in South Vietnam (RVN) to a conventional war in South VN and the skies over North Vietnam.
Because the North Viet Navy attacked the USN in the Tonkin Gulf.
Because the North Vietnamese Navy attacked the US Navy on the high seas (Tonkin Gulf).
No hydrogen bombs were dropped on Vietnam. No nuclear weapons of any kind were used in Vietnam.
Cambodia
Of the five commander in chiefs (US presidents) involved with the Vietnam War only two used B52s to bomb North Vietnam & launched extensive bombing campaigns over the North: LBJ & Nixon. Nixon was by far the most aggressive "B52 man." It was his favorite weapon. While LBJ (Johnson) was far more cautious and took great pains to avoid hitting Haiphong Harbor & Hanoi. LBJ didn't want to involve Red China nor the USSR in Vietnam, hence his caution; apparently Nixon made some secret agreements with the USSR/Red China when he visited them in about 1972, because his Linebacker bombing campaigns commenced that year. They didn't call President Nixon "Tricky Dick" for nothing!
A bomb goes off
Bomb craters tended to make swimming holes out of agricultural fields.
Lyndon B. Johnson when he was asked why the US had to bomb Vietnam on Christmas eve
The Warren Commission was about the JFK assassination of 1963. You're probably confusing this topic with the Tonkin Gulf Incident of 1964 which gave the authority for LBJ to bomb North Vietnam.
Because we weren't stupid!
No hydrogen bombs were dropped on Vietnam. No nuclear weapons of any kind were used in Vietnam.
President Johnson was, unlike his predecessor Kennedy, will to break the unwritten rules of the cold war, that is, he was willing to go to war with Vietnam. In 1964, after the Gulf of Tonkin incident, when North Vietnamese fired at American ships, Lyndon passed th Tonkin Gulf Resolution. This allowed him to "take all necessary measures to prevent further agression and acheive peace and security". Basically, he could wage war with Vietnam. This turned it from a war between the French and the Viet Minh into an international war involving America. In 1964, the USA began to bomb Vietnam
Cambodia
no but it was almost in Vietnam
A-Bomb.
They probably felt like most of the rest of the nation...conquer (invade) North Vietnam and use "the bomb" if necessary. The term, "the bomb" was the common phrase back in the 1950' and 1960's for "using nukes." "The bomb" was slang for "A-Bomb" which was short for "Atomic Bomb."
Of the five commander in chiefs (US presidents) involved with the Vietnam War only two used B52s to bomb North Vietnam & launched extensive bombing campaigns over the North: LBJ & Nixon. Nixon was by far the most aggressive "B52 man." It was his favorite weapon. While LBJ (Johnson) was far more cautious and took great pains to avoid hitting Haiphong Harbor & Hanoi. LBJ didn't want to involve Red China nor the USSR in Vietnam, hence his caution; apparently Nixon made some secret agreements with the USSR/Red China when he visited them in about 1972, because his Linebacker bombing campaigns commenced that year. They didn't call President Nixon "Tricky Dick" for nothing!
"we can/will bomb them back to the stone age"
A bomb goes off