North Vietnam invaded South Vietnam

O True
O False​

f not sure mark brainliest plz

THIS IS TRUE

Explanation:

In the spring of 1975 the North Vietnamese army conquered all of South Vietnam, and the following year North and South were formally united in the Socialist Republic of Vietnam.

The Vietnam War, also known as the Second Indochina War, was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam and South Vietnam.

i think u are supposed to write a long-essay answers to the long-essay questions