Прэахвихеа
The last place where it was hoisted as official flag of the state was in May 1975 in the final area held by the Khmer National Armed Forces on the escarpment of the Preah Vihear Temple in the Dângrêk Mountains. Even though their government had surrendered, loyalist Khmer Republic soldiers continued to fiercely hold their ground for nearly a month after the fall of Phnom Penh. Finally that outpost fell to the Khmer Rouge on 22 May 1975. The flag of Democratic Kampuchea became the flag of Cambodia after the ousting of the republican government.