North Vietnam started the war against South Vietnam; the US went to the aid of the South.
It was called the "Air War" over North Vietnam.
The most legendary and difficult was the Thanh Hoa.
it started in 1883 ;-]
North Vietnam was the scene of the AIR WAR during the Vietnam War. N. Vietnam was bombed by air units from the US Navy and US Air Force. US Marine Corps units bombed in South Vietnam in support of their ground Marines. North Vietnam defended itself in North Vietnam with SAM sites and NVAF MiG 17, 19, and MiG 21 jet interceptors.
The countries that were actually "physically" involved, and were bombed or had US aircraft crash into them, whether they were "officially" in the war or not, were: Lao's, Cambodia, North Vietnam and South Vietnam.
Those areas in and around Hanoi that were heavily bombed.
War against North Vietnam started on 07 August 1964 with the Tonkin Gulf Resolution.
Cambodia .
War started in RVN in '55. War started against N. VN in '64.
The communists!
ww2 ended in 1945. Vietnam war started in 1959.