What was the outcome of the Vietnam War?

Restoration of the Vietnamese monarchy
Annexation of the Democratic South Vietnam by Communist North Vietnam
Annexation of Vietnam by China
Formation of a democratic government in Vietnam

The outcome of the Vietnam War was the annexation of the Democratic South Vietnam by Communist North Vietnam, leading to the establishment of a unified Communist Vietnam. There was no restoration of the Vietnamese monarchy or annexation by China. The formation of a democratic government did not occur at the end of the war.