What happened to Vietnam in 1975?

In 1975, Vietnam was reunited under communist control after decades of conflict that included the Vietnam War and the earlier struggle for independence from colonial rule. The war, which lasted from the late 1950s to 1975, resulted in the fall of Saigon (now Ho Chi Minh City) to North Vietnamese forces on April 30, 1975, effectively marking the end of the conflict. Following this event, the country was officially unified as the Socialist Republic of Vietnam. This change solidified the dominance of communist ideology in the region and marked a significant moment in Cold War history, as it ended American involvement and influence in Vietnam. The other choices do not accurately reflect the historical context of Vietnam in 1975, as the nation was not established as a democracy, did not gain independence from France at that time, nor did it remain divided, which had occurred earlier during the conflict.