<human>: I'd like to know more about the history of the Vietnam War.
<bot>: The Vietnam War was a major conflict that took place in Vietnam from 1955 to 1975, involving the United States and North Vietnam (the Communist government of Vietnam) against South Vietnam (supported by the United States). It began as part of the Cold War between the Soviet Union and the United States, but escalated into a broader war with other countries such as China, Cambodia, and Laos also involved. The war ended when the North Vietnamese Army invaded the South in 1975.