The Nguyen dynasty was the last indigenous monarchy of this country, which was under French colonial rule until the Battle of Dien Bien Phu.
According to this country's mythology, its citizens are descended from the fairy Au Co and the dragon Lac Long. This country was liberated from Han Dynasty rule by a rebellion led by two sisters, and it assimilated the Champa kingdom. Gia Long was the first emperor of its last ruling dynasty, and during the early 20th century, this country adopted the Quoc Ngu writing system. The Nguyen dynasty was the last indigenous monarchy of this country, which was under French colonial rule until the Battle of Dien Bien Phu. For 10 points, name this country, the namesake of the war incited by the Gulf of Tonkin incident and whose largest city is named for its first communist leader, Ho Chi Minh.
According to this country's mythology, its citizens are descended from the fairy Au Co and the dragon Lac Long.
Vietnam