After the treaty.
how come the united states did not invade north vietnam to end the war
Yes,yes they did.
1944
NORTH Vietnam "invaded" South Vietnam (successfully by 1975). South VN never invaded North VN.
If we invade North Vietnam, the chances would have been, China & stupid Soviets enter the war and start a WWIII.
Use nukes or invade the north.
We stopped em (communists) in Korea, we'd stop em again in Vietnam. However, we didn't repeat one mistake...we did NOT invade North Vietnam as we DID invade North Korea during the Korean War. That action (in Korea) brought Red China into the war. We bombed North Vietnam, but did not invade it.
The North Vietnamese Army would break the treaty and invaded South Vietnam. South Vietnam quickly fell to North Vietnam, which created one, Socialist Vietnam.
Most definitely. Simply had to invade North Vietnam. If the Soviets or Red China intervened; use nuclear weapons against them. Which is why North Vietnam wasn't invaded.
Laos & Cambodia
Yes; invade the north and/or use nukes.
The Korean War directly resulted in the US NOT INVADING North Vietnam.