On 30 April 1975, Saigon fell, and as a result, the Vietnam War ended and some South Vietnamese citizens evacuated to other countries. Popular music released up to that day (dubbed "yellow music") was then prohibited - specifically after July 2, 1976 - due to its sentimental and sympathetic nature. Music that was patriotic and followed a traditional revolutionary theme (dubbed "red music"), as well as folk songs, had "good values," and were encouraged by the then-newly re-unified Communist Vietnam. However, South Vietnamese classics (dubbed "Nhạc trẻ") continued to survive in overseas Vietnamese communities, where it remained even after being reintroduced back to Vietnam in 1986.