South Vietnam no longer existed after 1975. People in the "former" Republic of South Vietnam became "Vietnamese" citizens under their new "Communist" government.
Air war over North Vietnam. Ground war in South Vietnam; Riverine war in South Vietnam.
North Vietnam launched an invasion of South Vietnam.North Vietnam launched an invasion of south Vietnam.
The answer is yes, South Korea was in the Vietnam War!
Air war-North Vietnam Ground war-South Vietnam
North Vietnam started the war against South Vietnam; the US went to the aid of the South.
The US Civil War (1861-1865) and the Vietnam War (1961-1975) are the only wars in which US citizens experienced a military defeat. In both wars the NORTH defeated the SOUTH. In both wars the Southerners/GI's fighting for South Vietnam were treated harshly (called and treated as "losers") by their fellow US Citizens. Even though the US Civil War was a victorious United States victory, the Confederates (Southerners) were still Americans. Secondly, the Vietnam War was our longest war, outlasting the American Revolutionary War by several years.
Citizens from both wars were conscripted. Citizens from both wars protested and rioted.
At the end of the Vietnam War, Congress refused to support South Vietnam any longer.
See: Vietnam war statistics
North Vietnam=Air War South Vietnam=Ground & Riverine War
?........the Vietnam war was a war between north and south Vietnam and America. America was trying to defend south Vietnam from the north invading and controling their territory. so America was on the side with south Vietnam