Tiếng Gọi Công Dân

The "Thanh Niên Hành Khúc" ( Saigon:  [tʰan niəŋ hân xúk],Chữ Nôm: 青年行曲, March of the Youths), later known as "Call to the Citizens" (Vietnamese: Tiếng Gọi Công Dân), Chữ Nôm: 㗂噲公民, and before that "March of the Students" (Vietnamese: Sinh Viên Hành Khúc), Chữ Nôm: 生員行曲, was the national anthem of South Vietnam from 1948 to 1975.

After the end of the Vietnam War in 1975, the South Vietnamese state was disbanded and thus its national anthem was discontinued. It was replaced with "Giải phóng miền Nam", which was then replaced with "Tiến Quân Ca" when South Vietnam was annexed by North Vietnam. However, the song is still used by Vietnamese expatriates living in the United States, among those in other countries where South Vietnamese refugees consequently resided after the war, as the "Anthem of Free Vietnam".

In When the Cold Breeze Blows Away, it would be used to be national anthem of normal South Vietnam due to Grand Alliance and United States accept but when South Vietnam having Ducangers and their rules after Ducanger Revolution, it would becoming official national anthem of true Republic of Vietnam and Ducangers by Ngo Dinh Diem.

And later being played in chapter Sữa Máu that the loudspeakers opened and played before Nguyen Van Thieu's speech