Is it older
Is Third Indochina War: Cambodian–Vietnamese War: Phnom Penh falls to the advancing Vietnamese troops, driving out Pol P… older than you?
Third Indochina War: Cambodian–Vietnamese War: Phnom Penh falls to the advancing Vietnamese troops, driving out Pol Pot and the Khmer Rouge.
If this happened before you were born, it is older than you. Your profile answers it exactly.