The U.S used no nuclear weapons whatsoever on Vietnam.
Nuclear weapons were not used in the Vietnam War.
None. No nuclear weapons were used in Viet Nam.
Nuclear weapons were not used during the Vietnam war
None.
The war escalated from a guerrilla war into a conventional war (minus nuclear weapons).
Fear that the North Vietnamese would obtain nuclear weapons themselves (from Russia or China) and use them on South Vietnam or even on America.
The US did not want to risk a nuclear confrontation with the communist superpowers.
I don't think anyone did.
Cold War=Created by Nuclear Weapons (Atomic Weapons). LBJ was limited by the threat of atomic war. If nuclear weapons never existed, then the Vietnam War could've been fought like any other pre-atomic age war...invasion, using all weapons available (except for the non existing atomic weapons)...etc...etc.
During the Vietnam War, a nuclear bomb was found and successfully defused by American special forces.
Limited war (not total war). Total war implied using all available means (nuclear weapons).