Phnom Penh from 1970 onward had not seen much developments due to the Cambodian civil war. The original population of Phnom Penh City of 900,000 had swelled to over 2,000,000 at the end of the war in 1975 because of war refugees from the countryside.
On the contrary, many infrastructures had been destroyed by fighting and shells. In 1973, the Khmer Rouge mined Chroy Changvar Bridge two times which eventually destroyed it.
Phnom Penh during the Khmer Rouge Reign of Terror: 1975-1979
The Khmer Rouge took power on 17th April 1975 and immediately began to evacuate whole population out of the city.
In three days, a city with a population of 2,000,000 had been reduced to a population of a few Khmer Rouge officials. Many infrastructures and buildings and part of the city had been significantly destroyed.
After the Vietnamese troops toppled the Khmer Rouge on 5th January 1979, the population began to return to Phnom Penh. As of 1998,
The population of Phnom Penh City had numbered to 862,000 people, including 149,000 families. In 2009, the population of Phnom Penh is estimated to number more than a million out of a total country’s population of approximately 14,000,000