It was the Khmer Republic from 1970 until 1975
In March 1970, Marshal Lon Nol, a Cambodian politician who had 
previously served ... From January to August 1973, the Khmer Republic 
government, with ... A few days after they took power in 1975, the Khmer Rouge 
forced perhaps two... [DOC] [TLE] Cambodian Flag History - CRW Flags Inc. [PAR] [Flag of Khmer Republic, 1970-75] image by P. ...