The US didn't win it. Or...North Vietnam won the war. Either way is preferable to "losing the war" according to the many hard core historians.
For North Vietnam to win the war; which they did.
vietnam
For North Vietnam to win the war; which they did.
North Vietnam won the war.
North Vietnam won the war.
The Vietnam War.
North Vietnam won South Vietnam by conquering it.
Yes. Vietnam was a French colony. They lost a Vietnam War and were thrown out of Vietnam before America tried to win a war in Vietnam. America also lost a Vietnam War.
Vietnam
How can a war lose? you can lose a war or someone can win but a war its self can't lose.
See: Statistics about the Vietnam War